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Finding the Fourth Proportional to 65,609.74, 90,538.80 and 38,760.88

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Solution

The fourth proportional to 65,609.74, 90,538.80 and 38,760.88 is: 53,488.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,609.74 : 90,538.80 = 38,760.88 : x
  2. Step 2: Convert to fraction form
    65,609.74/90,538.80 = 38,760.88/x
  3. Step 3: Cross multiply
    65,609.74x = 90,538.80 × 38,760.88
  4. Step 4: Simplify right side
    65,609.74x = 3,509,363,562.14
  5. Step 5: Solve for x
    x = 3,509,363,562.14/65,609.74
  6. Step 6: Final answer
    x = 53,488.45

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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.