Home / 91,782.86-137,545.07-72,979.44

Finding the Fourth Proportional to 91,782.86, 137,545.07 and 72,979.44

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Solution

The fourth proportional to 91,782.86, 137,545.07 and 72,979.44 is: 109,366.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,782.86 : 137,545.07 = 72,979.44 : x
  2. Step 2: Convert to fraction form
    91,782.86/137,545.07 = 72,979.44/x
  3. Step 3: Cross multiply
    91,782.86x = 137,545.07 × 72,979.44
  4. Step 4: Simplify right side
    91,782.86x = 10,037,961,818.46
  5. Step 5: Solve for x
    x = 10,037,961,818.46/91,782.86
  6. Step 6: Final answer
    x = 109,366.41

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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.