Home / 128,450.22-177,320.82-74,715.66

Finding the Fourth Proportional to 128,450.22, 177,320.82 and 74,715.66

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Solution

The fourth proportional to 128,450.22, 177,320.82 and 74,715.66 is: 103,142.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,450.22 : 177,320.82 = 74,715.66 : x
  2. Step 2: Convert to fraction form
    128,450.22/177,320.82 = 74,715.66/x
  3. Step 3: Cross multiply
    128,450.22x = 177,320.82 × 74,715.66
  4. Step 4: Simplify right side
    128,450.22x = 13,248,642,098.04
  5. Step 5: Solve for x
    x = 13,248,642,098.04/128,450.22
  6. Step 6: Final answer
    x = 103,142.23

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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.