Home / 128,479.40-177,292.95-71,114.85

Finding the Fourth Proportional to 128,479.40, 177,292.95 and 71,114.85

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Solution

The fourth proportional to 128,479.40, 177,292.95 and 71,114.85 is: 98,133.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,479.40 : 177,292.95 = 71,114.85 : x
  2. Step 2: Convert to fraction form
    128,479.40/177,292.95 = 71,114.85/x
  3. Step 3: Cross multiply
    128,479.40x = 177,292.95 × 71,114.85
  4. Step 4: Simplify right side
    128,479.40x = 12,608,161,545.31
  5. Step 5: Solve for x
    x = 12,608,161,545.31/128,479.40
  6. Step 6: Final answer
    x = 98,133.72

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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.