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Finding the Fourth Proportional to 83,728.80, 125,884.80 and 70,898.40

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Solution

The fourth proportional to 83,728.80, 125,884.80 and 70,898.40 is: 106,594.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,728.80 : 125,884.80 = 70,898.40 : x
  2. Step 2: Convert to fraction form
    83,728.80/125,884.80 = 70,898.40/x
  3. Step 3: Cross multiply
    83,728.80x = 125,884.80 × 70,898.40
  4. Step 4: Simplify right side
    83,728.80x = 8,925,030,904.32
  5. Step 5: Solve for x
    x = 8,925,030,904.32/83,728.80
  6. Step 6: Final answer
    x = 106,594.52

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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.