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Finding the Fourth Proportional to 82,425.60, 123,638.40 and 64,710.90

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Solution

The fourth proportional to 82,425.60, 123,638.40 and 64,710.90 is: 97,066.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,425.60 : 123,638.40 = 64,710.90 : x
  2. Step 2: Convert to fraction form
    82,425.60/123,638.40 = 64,710.90/x
  3. Step 3: Cross multiply
    82,425.60x = 123,638.40 × 64,710.90
  4. Step 4: Simplify right side
    82,425.60x = 8,000,752,138.56
  5. Step 5: Solve for x
    x = 8,000,752,138.56/82,425.60
  6. Step 6: Final answer
    x = 97,066.35

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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.