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Finding the Fourth Proportional to 124,916.80, 187,310.40 and 45,990.40

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Solution

The fourth proportional to 124,916.80, 187,310.40 and 45,990.40 is: 68,961.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,916.80 : 187,310.40 = 45,990.40 : x
  2. Step 2: Convert to fraction form
    124,916.80/187,310.40 = 45,990.40/x
  3. Step 3: Cross multiply
    124,916.80x = 187,310.40 × 45,990.40
  4. Step 4: Simplify right side
    124,916.80x = 8,614,480,220.16
  5. Step 5: Solve for x
    x = 8,614,480,220.16/124,916.80
  6. Step 6: Final answer
    x = 68,961.74

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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.