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Finding the Fourth Proportional to 157,130.78, 216,845.40 and 89,150.62

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Solution

The fourth proportional to 157,130.78, 216,845.40 and 89,150.62 is: 123,030.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,130.78 : 216,845.40 = 89,150.62 : x
  2. Step 2: Convert to fraction form
    157,130.78/216,845.40 = 89,150.62/x
  3. Step 3: Cross multiply
    157,130.78x = 216,845.40 × 89,150.62
  4. Step 4: Simplify right side
    157,130.78x = 19,331,901,854.15
  5. Step 5: Solve for x
    x = 19,331,901,854.15/157,130.78
  6. Step 6: Final answer
    x = 123,030.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.