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Finding the Fourth Proportional to 83,999.60, 125,853.60 and 78,750.80

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Solution

The fourth proportional to 83,999.60, 125,853.60 and 78,750.80 is: 117,989.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,999.60 : 125,853.60 = 78,750.80 : x
  2. Step 2: Convert to fraction form
    83,999.60/125,853.60 = 78,750.80/x
  3. Step 3: Cross multiply
    83,999.60x = 125,853.60 × 78,750.80
  4. Step 4: Simplify right side
    83,999.60x = 9,911,071,682.88
  5. Step 5: Solve for x
    x = 9,911,071,682.88/83,999.60
  6. Step 6: Final answer
    x = 117,989.51

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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.