Home / 129,445.43-178,722.47-81,066.77

Finding the Fourth Proportional to 129,445.43, 178,722.47 and 81,066.77

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Solution

The fourth proportional to 129,445.43, 178,722.47 and 81,066.77 is: 111,927.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,445.43 : 178,722.47 = 81,066.77 : x
  2. Step 2: Convert to fraction form
    129,445.43/178,722.47 = 81,066.77/x
  3. Step 3: Cross multiply
    129,445.43x = 178,722.47 × 81,066.77
  4. Step 4: Simplify right side
    129,445.43x = 14,488,452,678.38
  5. Step 5: Solve for x
    x = 14,488,452,678.38/129,445.43
  6. Step 6: Final answer
    x = 111,927.11

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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.