Home / 78,553.67-117,861.75-28,637.15

Finding the Fourth Proportional to 78,553.67, 117,861.75 and 28,637.15

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Solution

The fourth proportional to 78,553.67, 117,861.75 and 28,637.15 is: 42,967.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,553.67 : 117,861.75 = 28,637.15 : x
  2. Step 2: Convert to fraction form
    78,553.67/117,861.75 = 28,637.15/x
  3. Step 3: Cross multiply
    78,553.67x = 117,861.75 × 28,637.15
  4. Step 4: Simplify right side
    78,553.67x = 3,375,224,024.70
  5. Step 5: Solve for x
    x = 3,375,224,024.70/78,553.67
  6. Step 6: Final answer
    x = 42,967.11

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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.