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Finding the Fourth Proportional to 63,613.76, 87,729.68 and 39,742.79

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Solution

The fourth proportional to 63,613.76, 87,729.68 and 39,742.79 is: 54,809.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,613.76 : 87,729.68 = 39,742.79 : x
  2. Step 2: Convert to fraction form
    63,613.76/87,729.68 = 39,742.79/x
  3. Step 3: Cross multiply
    63,613.76x = 87,729.68 × 39,742.79
  4. Step 4: Simplify right side
    63,613.76x = 3,486,621,909.72
  5. Step 5: Solve for x
    x = 3,486,621,909.72/63,613.76
  6. Step 6: Final answer
    x = 54,809.25

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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.