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Finding the Fourth Proportional to 90,389.76, 124,663.92 and 63,620.88

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Solution

The fourth proportional to 90,389.76, 124,663.92 and 63,620.88 is: 87,744.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,389.76 : 124,663.92 = 63,620.88 : x
  2. Step 2: Convert to fraction form
    90,389.76/124,663.92 = 63,620.88/x
  3. Step 3: Cross multiply
    90,389.76x = 124,663.92 × 63,620.88
  4. Step 4: Simplify right side
    90,389.76x = 7,931,228,294.65
  5. Step 5: Solve for x
    x = 7,931,228,294.65/90,389.76
  6. Step 6: Final answer
    x = 87,744.77

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1.5x scale

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.