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Finding the Fourth Proportional to 72,508.80, 108,718.80 and 66,320.92

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Solution

The fourth proportional to 72,508.80, 108,718.80 and 66,320.92 is: 99,440.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,508.80 : 108,718.80 = 66,320.92 : x
  2. Step 2: Convert to fraction form
    72,508.80/108,718.80 = 66,320.92/x
  3. Step 3: Cross multiply
    72,508.80x = 108,718.80 × 66,320.92
  4. Step 4: Simplify right side
    72,508.80x = 7,210,330,837.30
  5. Step 5: Solve for x
    x = 7,210,330,837.30/72,508.80
  6. Step 6: Final answer
    x = 99,440.77

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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.