Home / 129,470.64-178,626.72-105,556.20

Finding the Fourth Proportional to 129,470.64, 178,626.72 and 105,556.20

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Solution

The fourth proportional to 129,470.64, 178,626.72 and 105,556.20 is: 145,632.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,470.64 : 178,626.72 = 105,556.20 : x
  2. Step 2: Convert to fraction form
    129,470.64/178,626.72 = 105,556.20/x
  3. Step 3: Cross multiply
    129,470.64x = 178,626.72 × 105,556.20
  4. Step 4: Simplify right side
    129,470.64x = 18,855,157,781.66
  5. Step 5: Solve for x
    x = 18,855,157,781.66/129,470.64
  6. Step 6: Final answer
    x = 145,632.69

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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.