Home / 129,572.52-178,803.18-72,980.25

Finding the Fourth Proportional to 129,572.52, 178,803.18 and 72,980.25

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Solution

The fourth proportional to 129,572.52, 178,803.18 and 72,980.25 is: 100,708.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,572.52 : 178,803.18 = 72,980.25 : x
  2. Step 2: Convert to fraction form
    129,572.52/178,803.18 = 72,980.25/x
  3. Step 3: Cross multiply
    129,572.52x = 178,803.18 × 72,980.25
  4. Step 4: Simplify right side
    129,572.52x = 13,049,100,777.20
  5. Step 5: Solve for x
    x = 13,049,100,777.20/129,572.52
  6. Step 6: Final answer
    x = 100,708.86

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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.