Home / 128,899.97-177,883.17-72,312.56

Finding the Fourth Proportional to 128,899.97, 177,883.17 and 72,312.56

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Solution

The fourth proportional to 128,899.97, 177,883.17 and 72,312.56 is: 99,792.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,899.97 : 177,883.17 = 72,312.56 : x
  2. Step 2: Convert to fraction form
    128,899.97/177,883.17 = 72,312.56/x
  3. Step 3: Cross multiply
    128,899.97x = 177,883.17 × 72,312.56
  4. Step 4: Simplify right side
    128,899.97x = 12,863,187,316.85
  5. Step 5: Solve for x
    x = 12,863,187,316.85/128,899.97
  6. Step 6: Final answer
    x = 99,792.01

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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.