Home / 78,427.74-117,641.61-28,498.53

Finding the Fourth Proportional to 78,427.74, 117,641.61 and 28,498.53

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Solution

The fourth proportional to 78,427.74, 117,641.61 and 28,498.53 is: 42,747.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,427.74 : 117,641.61 = 28,498.53 : x
  2. Step 2: Convert to fraction form
    78,427.74/117,641.61 = 28,498.53/x
  3. Step 3: Cross multiply
    78,427.74x = 117,641.61 × 28,498.53
  4. Step 4: Simplify right side
    78,427.74x = 3,352,612,951.83
  5. Step 5: Solve for x
    x = 3,352,612,951.83/78,427.74
  6. Step 6: Final answer
    x = 42,747.80

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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.