Home / 128,701.12-177,608.48-77,716.16

Finding the Fourth Proportional to 128,701.12, 177,608.48 and 77,716.16

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Solution

The fourth proportional to 128,701.12, 177,608.48 and 77,716.16 is: 107,248.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,701.12 : 177,608.48 = 77,716.16 : x
  2. Step 2: Convert to fraction form
    128,701.12/177,608.48 = 77,716.16/x
  3. Step 3: Cross multiply
    128,701.12x = 177,608.48 × 77,716.16
  4. Step 4: Simplify right side
    128,701.12x = 13,803,049,049.04
  5. Step 5: Solve for x
    x = 13,803,049,049.04/128,701.12
  6. Step 6: Final answer
    x = 107,248.87

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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.