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Finding the Fourth Proportional to 128,973.40, 193,460.10 and 115,851.40

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Solution

The fourth proportional to 128,973.40, 193,460.10 and 115,851.40 is: 173,777.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,973.40 : 193,460.10 = 115,851.40 : x
  2. Step 2: Convert to fraction form
    128,973.40/193,460.10 = 115,851.40/x
  3. Step 3: Cross multiply
    128,973.40x = 193,460.10 × 115,851.40
  4. Step 4: Simplify right side
    128,973.40x = 22,412,623,429.14
  5. Step 5: Solve for x
    x = 22,412,623,429.14/128,973.40
  6. Step 6: Final answer
    x = 173,777.10

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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.