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Finding the Fourth Proportional to 82,915.60, 124,680.60 and 69,398.80

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Solution

The fourth proportional to 82,915.60, 124,680.60 and 69,398.80 is: 104,355.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,915.60 : 124,680.60 = 69,398.80 : x
  2. Step 2: Convert to fraction form
    82,915.60/124,680.60 = 69,398.80/x
  3. Step 3: Cross multiply
    82,915.60x = 124,680.60 × 69,398.80
  4. Step 4: Simplify right side
    82,915.60x = 8,652,684,023.28
  5. Step 5: Solve for x
    x = 8,652,684,023.28/82,915.60
  6. Step 6: Final answer
    x = 104,355.32

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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.