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Finding the Fourth Proportional to 90,437.76, 124,812 and 52,711.20

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Solution

The fourth proportional to 90,437.76, 124,812 and 52,711.20 is: 72,746.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,437.76 : 124,812 = 52,711.20 : x
  2. Step 2: Convert to fraction form
    90,437.76/124,812 = 52,711.20/x
  3. Step 3: Cross multiply
    90,437.76x = 124,812 × 52,711.20
  4. Step 4: Simplify right side
    90,437.76x = 6,578,990,294.40
  5. Step 5: Solve for x
    x = 6,578,990,294.40/90,437.76
  6. Step 6: Final answer
    x = 72,746.06

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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.