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Finding the Fourth Proportional to 83,242,968.60, 124,864,452.90 and 81,808,077.90

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Solution

The fourth proportional to 83,242,968.60, 124,864,452.90 and 81,808,077.90 is: 122,712,116.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,242,968.60 : 124,864,452.90 = 81,808,077.90 : x
  2. Step 2: Convert to fraction form
    83,242,968.60/124,864,452.90 = 81,808,077.90/x
  3. Step 3: Cross multiply
    83,242,968.60x = 124,864,452.90 × 81,808,077.90
  4. Step 4: Simplify right side
    83,242,968.60x = 10,214,920,889,784,082
  5. Step 5: Solve for x
    x = 10,214,920,889,784,082/83,242,968.60
  6. Step 6: Final answer
    x = 122,712,116.85

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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.