Home / 72,035.20-99,407.68-39,770.08

Finding the Fourth Proportional to 72,035.20, 99,407.68 and 39,770.08

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Solution

The fourth proportional to 72,035.20, 99,407.68 and 39,770.08 is: 54,882.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,035.20 : 99,407.68 = 39,770.08 : x
  2. Step 2: Convert to fraction form
    72,035.20/99,407.68 = 39,770.08/x
  3. Step 3: Cross multiply
    72,035.20x = 99,407.68 × 39,770.08
  4. Step 4: Simplify right side
    72,035.20x = 3,953,451,386.21
  5. Step 5: Solve for x
    x = 3,953,451,386.21/72,035.20
  6. Step 6: Final answer
    x = 54,882.22

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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.