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Finding the Fourth Proportional to 72,429.80, 108,644.70 and 42,832.40

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Solution

The fourth proportional to 72,429.80, 108,644.70 and 42,832.40 is: 64,248.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,429.80 : 108,644.70 = 42,832.40 : x
  2. Step 2: Convert to fraction form
    72,429.80/108,644.70 = 42,832.40/x
  3. Step 3: Cross multiply
    72,429.80x = 108,644.70 × 42,832.40
  4. Step 4: Simplify right side
    72,429.80x = 4,653,513,248.28
  5. Step 5: Solve for x
    x = 4,653,513,248.28/72,429.80
  6. Step 6: Final answer
    x = 64,248.60

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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.