Home / 128,707.20-177,510.63-90,592.92

Finding the Fourth Proportional to 128,707.20, 177,510.63 and 90,592.92

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Solution

The fourth proportional to 128,707.20, 177,510.63 and 90,592.92 is: 124,944.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,707.20 : 177,510.63 = 90,592.92 : x
  2. Step 2: Convert to fraction form
    128,707.20/177,510.63 = 90,592.92/x
  3. Step 3: Cross multiply
    128,707.20x = 177,510.63 × 90,592.92
  4. Step 4: Simplify right side
    128,707.20x = 16,081,206,520.03
  5. Step 5: Solve for x
    x = 16,081,206,520.03/128,707.20
  6. Step 6: Final answer
    x = 124,944.11

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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.