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Finding the Fourth Proportional to 72,439.68, 108,671.04 and 30,887.04

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Solution

The fourth proportional to 72,439.68, 108,671.04 and 30,887.04 is: 46,335.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,439.68 : 108,671.04 = 30,887.04 : x
  2. Step 2: Convert to fraction form
    72,439.68/108,671.04 = 30,887.04/x
  3. Step 3: Cross multiply
    72,439.68x = 108,671.04 × 30,887.04
  4. Step 4: Simplify right side
    72,439.68x = 3,356,526,759.32
  5. Step 5: Solve for x
    x = 3,356,526,759.32/72,439.68
  6. Step 6: Final answer
    x = 46,335.47

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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.