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Finding the Fourth Proportional to 82,876.60, 124,314.90 and 61,881.40

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Solution

The fourth proportional to 82,876.60, 124,314.90 and 61,881.40 is: 92,822.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,876.60 : 124,314.90 = 61,881.40 : x
  2. Step 2: Convert to fraction form
    82,876.60/124,314.90 = 61,881.40/x
  3. Step 3: Cross multiply
    82,876.60x = 124,314.90 × 61,881.40
  4. Step 4: Simplify right side
    82,876.60x = 7,692,780,052.86
  5. Step 5: Solve for x
    x = 7,692,780,052.86/82,876.60
  6. Step 6: Final answer
    x = 92,822.10

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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.