Home / 129,708.95-178,993.53-72,345.15

Finding the Fourth Proportional to 129,708.95, 178,993.53 and 72,345.15

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Solution

The fourth proportional to 129,708.95, 178,993.53 and 72,345.15 is: 99,833.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,708.95 : 178,993.53 = 72,345.15 : x
  2. Step 2: Convert to fraction form
    129,708.95/178,993.53 = 72,345.15/x
  3. Step 3: Cross multiply
    129,708.95x = 178,993.53 × 72,345.15
  4. Step 4: Simplify right side
    129,708.95x = 12,949,313,776.88
  5. Step 5: Solve for x
    x = 12,949,313,776.88/129,708.95
  6. Step 6: Final answer
    x = 99,833.62

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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.