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Finding the Fourth Proportional to 113,045.80, 156,006.30 and 72,837.40

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Solution

The fourth proportional to 113,045.80, 156,006.30 and 72,837.40 is: 100,517.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,045.80 : 156,006.30 = 72,837.40 : x
  2. Step 2: Convert to fraction form
    113,045.80/156,006.30 = 72,837.40/x
  3. Step 3: Cross multiply
    113,045.80x = 156,006.30 × 72,837.40
  4. Step 4: Simplify right side
    113,045.80x = 11,363,093,275.62
  5. Step 5: Solve for x
    x = 11,363,093,275.62/113,045.80
  6. Step 6: Final answer
    x = 100,517.61

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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.