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Finding the Fourth Proportional to 72,228.68, 99,675 and 40,397.55

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Solution

The fourth proportional to 72,228.68, 99,675 and 40,397.55 is: 55,748.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,228.68 : 99,675 = 40,397.55 : x
  2. Step 2: Convert to fraction form
    72,228.68/99,675 = 40,397.55/x
  3. Step 3: Cross multiply
    72,228.68x = 99,675 × 40,397.55
  4. Step 4: Simplify right side
    72,228.68x = 4,026,625,796.25
  5. Step 5: Solve for x
    x = 4,026,625,796.25/72,228.68
  6. Step 6: Final answer
    x = 55,748.30

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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.