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Finding the Fourth Proportional to 128,719,048.05, 193,078,572.08 and 128,719,048.05

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Solution

The fourth proportional to 128,719,048.05, 193,078,572.08 and 128,719,048.05 is: 193,078,572.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,719,048.05 : 193,078,572.08 = 128,719,048.05 : x
  2. Step 2: Convert to fraction form
    128,719,048.05/193,078,572.08 = 128,719,048.05/x
  3. Step 3: Cross multiply
    128,719,048.05x = 193,078,572.08 × 128,719,048.05
  4. Step 4: Simplify right side
    128,719,048.05x = 24,852,889,996,347,312
  5. Step 5: Solve for x
    x = 24,852,889,996,347,312/128,719,048.05
  6. Step 6: Final answer
    x = 193,078,572.08

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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.