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Finding the Fourth Proportional to 72,355.20, 108,532.80 and 42,806.40

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Solution

The fourth proportional to 72,355.20, 108,532.80 and 42,806.40 is: 64,209.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,355.20 : 108,532.80 = 42,806.40 : x
  2. Step 2: Convert to fraction form
    72,355.20/108,532.80 = 42,806.40/x
  3. Step 3: Cross multiply
    72,355.20x = 108,532.80 × 42,806.40
  4. Step 4: Simplify right side
    72,355.20x = 4,645,898,449.92
  5. Step 5: Solve for x
    x = 4,645,898,449.92/72,355.20
  6. Step 6: Final answer
    x = 64,209.60

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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.