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Finding the Fourth Proportional to 129,886.40, 195,004.80 and 83,230.40

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Solution

The fourth proportional to 129,886.40, 195,004.80 and 83,230.40 is: 124,957.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,886.40 : 195,004.80 = 83,230.40 : x
  2. Step 2: Convert to fraction form
    129,886.40/195,004.80 = 83,230.40/x
  3. Step 3: Cross multiply
    129,886.40x = 195,004.80 × 83,230.40
  4. Step 4: Simplify right side
    129,886.40x = 16,230,327,505.92
  5. Step 5: Solve for x
    x = 16,230,327,505.92/129,886.40
  6. Step 6: Final answer
    x = 124,957.87

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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.