Home / 128,529.05-177,315.13-77,512.76

Finding the Fourth Proportional to 128,529.05, 177,315.13 and 77,512.76

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Solution

The fourth proportional to 128,529.05, 177,315.13 and 77,512.76 is: 106,934.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,529.05 : 177,315.13 = 77,512.76 : x
  2. Step 2: Convert to fraction form
    128,529.05/177,315.13 = 77,512.76/x
  3. Step 3: Cross multiply
    128,529.05x = 177,315.13 × 77,512.76
  4. Step 4: Simplify right side
    128,529.05x = 13,744,185,552.69
  5. Step 5: Solve for x
    x = 13,744,185,552.69/128,529.05
  6. Step 6: Final answer
    x = 106,934.47

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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.