Home / 128,329.06-177,098.13-71,740.18

Finding the Fourth Proportional to 128,329.06, 177,098.13 and 71,740.18

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Solution

The fourth proportional to 128,329.06, 177,098.13 and 71,740.18 is: 99,003.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,329.06 : 177,098.13 = 71,740.18 : x
  2. Step 2: Convert to fraction form
    128,329.06/177,098.13 = 71,740.18/x
  3. Step 3: Cross multiply
    128,329.06x = 177,098.13 × 71,740.18
  4. Step 4: Simplify right side
    128,329.06x = 12,705,051,723.86
  5. Step 5: Solve for x
    x = 12,705,051,723.86/128,329.06
  6. Step 6: Final answer
    x = 99,003.70

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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.