Home / 78,220.79-117,279.34-28,294.31

Finding the Fourth Proportional to 78,220.79, 117,279.34 and 28,294.31

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Solution

The fourth proportional to 78,220.79, 117,279.34 and 28,294.31 is: 42,422.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,220.79 : 117,279.34 = 28,294.31 : x
  2. Step 2: Convert to fraction form
    78,220.79/117,279.34 = 28,294.31/x
  3. Step 3: Cross multiply
    78,220.79x = 117,279.34 × 28,294.31
  4. Step 4: Simplify right side
    78,220.79x = 3,318,338,002.56
  5. Step 5: Solve for x
    x = 3,318,338,002.56/78,220.79
  6. Step 6: Final answer
    x = 42,422.71

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1.5x scale

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.