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Finding the Fourth Proportional to 72,074.92, 99,510.14 and 64,508.12

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Solution

The fourth proportional to 72,074.92, 99,510.14 and 64,508.12 is: 89,063.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,074.92 : 99,510.14 = 64,508.12 : x
  2. Step 2: Convert to fraction form
    72,074.92/99,510.14 = 64,508.12/x
  3. Step 3: Cross multiply
    72,074.92x = 99,510.14 × 64,508.12
  4. Step 4: Simplify right side
    72,074.92x = 6,419,212,052.34
  5. Step 5: Solve for x
    x = 6,419,212,052.34/72,074.92
  6. Step 6: Final answer
    x = 89,063.05

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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.