Home / 81,249.12-112,125.60-57,417.84

Finding the Fourth Proportional to 81,249.12, 112,125.60 and 57,417.84

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Solution

The fourth proportional to 81,249.12, 112,125.60 and 57,417.84 is: 79,237.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,249.12 : 112,125.60 = 57,417.84 : x
  2. Step 2: Convert to fraction form
    81,249.12/112,125.60 = 57,417.84/x
  3. Step 3: Cross multiply
    81,249.12x = 112,125.60 × 57,417.84
  4. Step 4: Simplify right side
    81,249.12x = 6,438,009,760.70
  5. Step 5: Solve for x
    x = 6,438,009,760.70/81,249.12
  6. Step 6: Final answer
    x = 79,237.90

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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.