Home / 78,139.68-117,225.95-25,545.03

Finding the Fourth Proportional to 78,139.68, 117,225.95 and 25,545.03

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Solution

The fourth proportional to 78,139.68, 117,225.95 and 25,545.03 is: 38,322.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,139.68 : 117,225.95 = 25,545.03 : x
  2. Step 2: Convert to fraction form
    78,139.68/117,225.95 = 25,545.03/x
  3. Step 3: Cross multiply
    78,139.68x = 117,225.95 × 25,545.03
  4. Step 4: Simplify right side
    78,139.68x = 2,994,540,281.80
  5. Step 5: Solve for x
    x = 2,994,540,281.80/78,139.68
  6. Step 6: Final answer
    x = 38,322.91

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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.