Home / 129,335.77-178,482.07-71,974.11

Finding the Fourth Proportional to 129,335.77, 178,482.07 and 71,974.11

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Solution

The fourth proportional to 129,335.77, 178,482.07 and 71,974.11 is: 99,323.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,335.77 : 178,482.07 = 71,974.11 : x
  2. Step 2: Convert to fraction form
    129,335.77/178,482.07 = 71,974.11/x
  3. Step 3: Cross multiply
    129,335.77x = 178,482.07 × 71,974.11
  4. Step 4: Simplify right side
    129,335.77x = 12,846,088,139.21
  5. Step 5: Solve for x
    x = 12,846,088,139.21/129,335.77
  6. Step 6: Final answer
    x = 99,323.55

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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.