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Finding the Fourth Proportional to 78,599.35, 117,824.91 and 39,119.14

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Solution

The fourth proportional to 78,599.35, 117,824.91 and 39,119.14 is: 58,641.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,599.35 : 117,824.91 = 39,119.14 : x
  2. Step 2: Convert to fraction form
    78,599.35/117,824.91 = 39,119.14/x
  3. Step 3: Cross multiply
    78,599.35x = 117,824.91 × 39,119.14
  4. Step 4: Simplify right side
    78,599.35x = 4,609,209,149.78
  5. Step 5: Solve for x
    x = 4,609,209,149.78/78,599.35
  6. Step 6: Final answer
    x = 58,641.82

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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.