Home / 128,680.74-177,575.13-71,317.62

Finding the Fourth Proportional to 128,680.74, 177,575.13 and 71,317.62

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Solution

The fourth proportional to 128,680.74, 177,575.13 and 71,317.62 is: 98,415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,680.74 : 177,575.13 = 71,317.62 : x
  2. Step 2: Convert to fraction form
    128,680.74/177,575.13 = 71,317.62/x
  3. Step 3: Cross multiply
    128,680.74x = 177,575.13 × 71,317.62
  4. Step 4: Simplify right side
    128,680.74x = 12,664,235,642.79
  5. Step 5: Solve for x
    x = 12,664,235,642.79/128,680.74
  6. Step 6: Final answer
    x = 98,415.94

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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.