Home / 129,475.80-178,660.08-72,876.24

Finding the Fourth Proportional to 129,475.80, 178,660.08 and 72,876.24

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Solution

The fourth proportional to 129,475.80, 178,660.08 and 72,876.24 is: 100,559.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,475.80 : 178,660.08 = 72,876.24 : x
  2. Step 2: Convert to fraction form
    129,475.80/178,660.08 = 72,876.24/x
  3. Step 3: Cross multiply
    129,475.80x = 178,660.08 × 72,876.24
  4. Step 4: Simplify right side
    129,475.80x = 13,020,074,868.50
  5. Step 5: Solve for x
    x = 13,020,074,868.50/129,475.80
  6. Step 6: Final answer
    x = 100,559.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.