Home / 129,329.46-178,436.12-81,598.19

Finding the Fourth Proportional to 129,329.46, 178,436.12 and 81,598.19

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Solution

The fourth proportional to 129,329.46, 178,436.12 and 81,598.19 is: 112,581.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,329.46 : 178,436.12 = 81,598.19 : x
  2. Step 2: Convert to fraction form
    129,329.46/178,436.12 = 81,598.19/x
  3. Step 3: Cross multiply
    129,329.46x = 178,436.12 × 81,598.19
  4. Step 4: Simplify right side
    129,329.46x = 14,560,063,122.45
  5. Step 5: Solve for x
    x = 14,560,063,122.45/129,329.46
  6. Step 6: Final answer
    x = 112,581.18

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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.