Home / 72,213.12-99,645.12-40,376.88

Finding the Fourth Proportional to 72,213.12, 99,645.12 and 40,376.88

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Solution

The fourth proportional to 72,213.12, 99,645.12 and 40,376.88 is: 55,715.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,213.12 : 99,645.12 = 40,376.88 : x
  2. Step 2: Convert to fraction form
    72,213.12/99,645.12 = 40,376.88/x
  3. Step 3: Cross multiply
    72,213.12x = 99,645.12 × 40,376.88
  4. Step 4: Simplify right side
    72,213.12x = 4,023,359,052.83
  5. Step 5: Solve for x
    x = 4,023,359,052.83/72,213.12
  6. Step 6: Final answer
    x = 55,715.07

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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.