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Finding the Fourth Proportional to 72,714.95, 109,074.23 and 20,124.89

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Solution

The fourth proportional to 72,714.95, 109,074.23 and 20,124.89 is: 30,187.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,714.95 : 109,074.23 = 20,124.89 : x
  2. Step 2: Convert to fraction form
    72,714.95/109,074.23 = 20,124.89/x
  3. Step 3: Cross multiply
    72,714.95x = 109,074.23 × 20,124.89
  4. Step 4: Simplify right side
    72,714.95x = 2,195,106,385.53
  5. Step 5: Solve for x
    x = 2,195,106,385.53/72,714.95
  6. Step 6: Final answer
    x = 30,187.83

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1.5x scale

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.