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Finding the Fourth Proportional to 72,245.52, 99,703.71 and 40,417.38

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Solution

The fourth proportional to 72,245.52, 99,703.71 and 40,417.38 is: 55,778.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,245.52 : 99,703.71 = 40,417.38 : x
  2. Step 2: Convert to fraction form
    72,245.52/99,703.71 = 40,417.38/x
  3. Step 3: Cross multiply
    72,245.52x = 99,703.71 × 40,417.38
  4. Step 4: Simplify right side
    72,245.52x = 4,029,762,734.48
  5. Step 5: Solve for x
    x = 4,029,762,734.48/72,245.52
  6. Step 6: Final answer
    x = 55,778.72

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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.