Home / 128,339.16-177,115.78-71,750.94

Finding the Fourth Proportional to 128,339.16, 177,115.78 and 71,750.94

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Solution

The fourth proportional to 128,339.16, 177,115.78 and 71,750.94 is: 99,020.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,339.16 : 177,115.78 = 71,750.94 : x
  2. Step 2: Convert to fraction form
    128,339.16/177,115.78 = 71,750.94/x
  3. Step 3: Cross multiply
    128,339.16x = 177,115.78 × 71,750.94
  4. Step 4: Simplify right side
    128,339.16x = 12,708,223,703.83
  5. Step 5: Solve for x
    x = 12,708,223,703.83/128,339.16
  6. Step 6: Final answer
    x = 99,020.62

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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.