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Finding the Fourth Proportional to 1,121,007,921.40, 1,681,511,882.10 and 1,121,007,921.40

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Solution

The fourth proportional to 1,121,007,921.40, 1,681,511,882.10 and 1,121,007,921.40 is: 1,681,511,882.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,007,921.40 : 1,681,511,882.10 = 1,121,007,921.40 : x
  2. Step 2: Convert to fraction form
    1,121,007,921.40/1,681,511,882.10 = 1,121,007,921.40/x
  3. Step 3: Cross multiply
    1,121,007,921.40x = 1,681,511,882.10 × 1,121,007,921.40
  4. Step 4: Simplify right side
    1,121,007,921.40x = 1,884,988,139,762,322,944
  5. Step 5: Solve for x
    x = 1,884,988,139,762,322,944/1,121,007,921.40
  6. Step 6: Final answer
    x = 1,681,511,882.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.