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Finding the Fourth Proportional to 90,497.31, 124,897.71 and 59,478.76

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Solution

The fourth proportional to 90,497.31, 124,897.71 and 59,478.76 is: 82,088.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,497.31 : 124,897.71 = 59,478.76 : x
  2. Step 2: Convert to fraction form
    90,497.31/124,897.71 = 59,478.76/x
  3. Step 3: Cross multiply
    90,497.31x = 124,897.71 × 59,478.76
  4. Step 4: Simplify right side
    90,497.31x = 7,428,760,917.64
  5. Step 5: Solve for x
    x = 7,428,760,917.64/90,497.31
  6. Step 6: Final answer
    x = 82,088.20

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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.