Home / 129,680.08-178,890.48-105,508.06

Finding the Fourth Proportional to 129,680.08, 178,890.48 and 105,508.06

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Solution

The fourth proportional to 129,680.08, 178,890.48 and 105,508.06 is: 145,545.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,680.08 : 178,890.48 = 105,508.06 : x
  2. Step 2: Convert to fraction form
    129,680.08/178,890.48 = 105,508.06/x
  3. Step 3: Cross multiply
    129,680.08x = 178,890.48 × 105,508.06
  4. Step 4: Simplify right side
    129,680.08x = 18,874,387,050.04
  5. Step 5: Solve for x
    x = 18,874,387,050.04/129,680.08
  6. Step 6: Final answer
    x = 145,545.77

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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.