Home / 78,213.59-117,250.21-28,281.95

Finding the Fourth Proportional to 78,213.59, 117,250.21 and 28,281.95

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Solution

The fourth proportional to 78,213.59, 117,250.21 and 28,281.95 is: 42,397.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,213.59 : 117,250.21 = 28,281.95 : x
  2. Step 2: Convert to fraction form
    78,213.59/117,250.21 = 28,281.95/x
  3. Step 3: Cross multiply
    78,213.59x = 117,250.21 × 28,281.95
  4. Step 4: Simplify right side
    78,213.59x = 3,316,064,576.71
  5. Step 5: Solve for x
    x = 3,316,064,576.71/78,213.59
  6. Step 6: Final answer
    x = 42,397.55

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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.