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Finding the Fourth Proportional to 113,815.40, 170,876.70 and 72,343.40

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Solution

The fourth proportional to 113,815.40, 170,876.70 and 72,343.40 is: 108,612.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,815.40 : 170,876.70 = 72,343.40 : x
  2. Step 2: Convert to fraction form
    113,815.40/170,876.70 = 72,343.40/x
  3. Step 3: Cross multiply
    113,815.40x = 170,876.70 × 72,343.40
  4. Step 4: Simplify right side
    113,815.40x = 12,361,801,458.78
  5. Step 5: Solve for x
    x = 12,361,801,458.78/113,815.40
  6. Step 6: Final answer
    x = 108,612.73

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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.