Home / 129,416.15-178,566.84-81,641.81

Finding the Fourth Proportional to 129,416.15, 178,566.84 and 81,641.81

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Solution

The fourth proportional to 129,416.15, 178,566.84 and 81,641.81 is: 112,648.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,416.15 : 178,566.84 = 81,641.81 : x
  2. Step 2: Convert to fraction form
    129,416.15/178,566.84 = 81,641.81/x
  3. Step 3: Cross multiply
    129,416.15x = 178,566.84 × 81,641.81
  4. Step 4: Simplify right side
    129,416.15x = 14,578,520,240.38
  5. Step 5: Solve for x
    x = 14,578,520,240.38/129,416.15
  6. Step 6: Final answer
    x = 112,648.38

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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.