Home / 99,412.11-137,192.49-56,978.83

Finding the Fourth Proportional to 99,412.11, 137,192.49 and 56,978.83

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Solution

The fourth proportional to 99,412.11, 137,192.49 and 56,978.83 is: 78,632.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,412.11 : 137,192.49 = 56,978.83 : x
  2. Step 2: Convert to fraction form
    99,412.11/137,192.49 = 56,978.83/x
  3. Step 3: Cross multiply
    99,412.11x = 137,192.49 × 56,978.83
  4. Step 4: Simplify right side
    99,412.11x = 7,817,067,564.99
  5. Step 5: Solve for x
    x = 7,817,067,564.99/99,412.11
  6. Step 6: Final answer
    x = 78,632.95

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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.