Home / 91,711.15-137,402.70-56,609.80

Finding the Fourth Proportional to 91,711.15, 137,402.70 and 56,609.80

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Solution

The fourth proportional to 91,711.15, 137,402.70 and 56,609.80 is: 84,813.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,711.15 : 137,402.70 = 56,609.80 : x
  2. Step 2: Convert to fraction form
    91,711.15/137,402.70 = 56,609.80/x
  3. Step 3: Cross multiply
    91,711.15x = 137,402.70 × 56,609.80
  4. Step 4: Simplify right side
    91,711.15x = 7,778,339,366.46
  5. Step 5: Solve for x
    x = 7,778,339,366.46/91,711.15
  6. Step 6: Final answer
    x = 84,813.45

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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.