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Finding the Fourth Proportional to 138,356.64, 207,460.72 and 43,569.12

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Solution

The fourth proportional to 138,356.64, 207,460.72 and 43,569.12 is: 65,330.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,356.64 : 207,460.72 = 43,569.12 : x
  2. Step 2: Convert to fraction form
    138,356.64/207,460.72 = 43,569.12/x
  3. Step 3: Cross multiply
    138,356.64x = 207,460.72 × 43,569.12
  4. Step 4: Simplify right side
    138,356.64x = 9,038,881,004.97
  5. Step 5: Solve for x
    x = 9,038,881,004.97/138,356.64
  6. Step 6: Final answer
    x = 65,330.30

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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.