Home / 128,416.12-177,210.82-71,053.94

Finding the Fourth Proportional to 128,416.12, 177,210.82 and 71,053.94

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Solution

The fourth proportional to 128,416.12, 177,210.82 and 71,053.94 is: 98,052.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,416.12 : 177,210.82 = 71,053.94 : x
  2. Step 2: Convert to fraction form
    128,416.12/177,210.82 = 71,053.94/x
  3. Step 3: Cross multiply
    128,416.12x = 177,210.82 × 71,053.94
  4. Step 4: Simplify right side
    128,416.12x = 12,591,527,237.02
  5. Step 5: Solve for x
    x = 12,591,527,237.02/128,416.12
  6. Step 6: Final answer
    x = 98,052.55

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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.