Home / 72,235.80-99,691.56-40,407.12

Finding the Fourth Proportional to 72,235.80, 99,691.56 and 40,407.12

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Solution

The fourth proportional to 72,235.80, 99,691.56 and 40,407.12 is: 55,765.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,235.80 : 99,691.56 = 40,407.12 : x
  2. Step 2: Convert to fraction form
    72,235.80/99,691.56 = 40,407.12/x
  3. Step 3: Cross multiply
    72,235.80x = 99,691.56 × 40,407.12
  4. Step 4: Simplify right side
    72,235.80x = 4,028,248,827.91
  5. Step 5: Solve for x
    x = 4,028,248,827.91/72,235.80
  6. Step 6: Final answer
    x = 55,765.27

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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.