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Finding the Fourth Proportional to 78,424.84, 117,540.92 and 36,247.84

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Solution

The fourth proportional to 78,424.84, 117,540.92 and 36,247.84 is: 54,327.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,424.84 : 117,540.92 = 36,247.84 : x
  2. Step 2: Convert to fraction form
    78,424.84/117,540.92 = 36,247.84/x
  3. Step 3: Cross multiply
    78,424.84x = 117,540.92 × 36,247.84
  4. Step 4: Simplify right side
    78,424.84x = 4,260,604,461.61
  5. Step 5: Solve for x
    x = 4,260,604,461.61/78,424.84
  6. Step 6: Final answer
    x = 54,327.23

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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.