Home / 78,939.15-118,424.28-25,621.17

Finding the Fourth Proportional to 78,939.15, 118,424.28 and 25,621.17

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Solution

The fourth proportional to 78,939.15, 118,424.28 and 25,621.17 is: 38,436.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,939.15 : 118,424.28 = 25,621.17 : x
  2. Step 2: Convert to fraction form
    78,939.15/118,424.28 = 25,621.17/x
  3. Step 3: Cross multiply
    78,939.15x = 118,424.28 × 25,621.17
  4. Step 4: Simplify right side
    78,939.15x = 3,034,168,610.01
  5. Step 5: Solve for x
    x = 3,034,168,610.01/78,939.15
  6. Step 6: Final answer
    x = 38,436.80

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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.