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Finding the Fourth Proportional to 78,841.40, 118,201.86 and 39,426.20

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Solution

The fourth proportional to 78,841.40, 118,201.86 and 39,426.20 is: 59,109.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,841.40 : 118,201.86 = 39,426.20 : x
  2. Step 2: Convert to fraction form
    78,841.40/118,201.86 = 39,426.20/x
  3. Step 3: Cross multiply
    78,841.40x = 118,201.86 × 39,426.20
  4. Step 4: Simplify right side
    78,841.40x = 4,660,250,172.73
  5. Step 5: Solve for x
    x = 4,660,250,172.73/78,841.40
  6. Step 6: Final answer
    x = 59,109.18

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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.