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Finding the Fourth Proportional to 99,391.60, 137,160.48 and 56,974.80

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Solution

The fourth proportional to 99,391.60, 137,160.48 and 56,974.80 is: 78,625.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,391.60 : 137,160.48 = 56,974.80 : x
  2. Step 2: Convert to fraction form
    99,391.60/137,160.48 = 56,974.80/x
  3. Step 3: Cross multiply
    99,391.60x = 137,160.48 × 56,974.80
  4. Step 4: Simplify right side
    99,391.60x = 7,814,690,915.90
  5. Step 5: Solve for x
    x = 7,814,690,915.90/99,391.60
  6. Step 6: Final answer
    x = 78,625.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.