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Finding the Fourth Proportional to 61,613.20, 92,419.80 and 20,064.40

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Solution

The fourth proportional to 61,613.20, 92,419.80 and 20,064.40 is: 30,096.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,613.20 : 92,419.80 = 20,064.40 : x
  2. Step 2: Convert to fraction form
    61,613.20/92,419.80 = 20,064.40/x
  3. Step 3: Cross multiply
    61,613.20x = 92,419.80 × 20,064.40
  4. Step 4: Simplify right side
    61,613.20x = 1,854,347,835.12
  5. Step 5: Solve for x
    x = 1,854,347,835.12/61,613.20
  6. Step 6: Final answer
    x = 30,096.60

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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.