Home / 128,377.04-177,155.40-71,786.96

Finding the Fourth Proportional to 128,377.04, 177,155.40 and 71,786.96

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Solution

The fourth proportional to 128,377.04, 177,155.40 and 71,786.96 is: 99,063.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,377.04 : 177,155.40 = 71,786.96 : x
  2. Step 2: Convert to fraction form
    128,377.04/177,155.40 = 71,786.96/x
  3. Step 3: Cross multiply
    128,377.04x = 177,155.40 × 71,786.96
  4. Step 4: Simplify right side
    128,377.04x = 12,717,447,613.58
  5. Step 5: Solve for x
    x = 12,717,447,613.58/128,377.04
  6. Step 6: Final answer
    x = 99,063.26

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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.