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Finding the Fourth Proportional to 57,742.60, 86,613.90 and 39,031.60

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Solution

The fourth proportional to 57,742.60, 86,613.90 and 39,031.60 is: 58,547.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,742.60 : 86,613.90 = 39,031.60 : x
  2. Step 2: Convert to fraction form
    57,742.60/86,613.90 = 39,031.60/x
  3. Step 3: Cross multiply
    57,742.60x = 86,613.90 × 39,031.60
  4. Step 4: Simplify right side
    57,742.60x = 3,380,679,099.24
  5. Step 5: Solve for x
    x = 3,380,679,099.24/57,742.60
  6. Step 6: Final answer
    x = 58,547.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.