Home / 91,712.15-137,404.20-56,610.80

Finding the Fourth Proportional to 91,712.15, 137,404.20 and 56,610.80

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Solution

The fourth proportional to 91,712.15, 137,404.20 and 56,610.80 is: 84,814.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,712.15 : 137,404.20 = 56,610.80 : x
  2. Step 2: Convert to fraction form
    91,712.15/137,404.20 = 56,610.80/x
  3. Step 3: Cross multiply
    91,712.15x = 137,404.20 × 56,610.80
  4. Step 4: Simplify right side
    91,712.15x = 7,778,561,685.36
  5. Step 5: Solve for x
    x = 7,778,561,685.36/91,712.15
  6. Step 6: Final answer
    x = 84,814.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.