Home / 128,922.66-177,916.33-72,338.22

Finding the Fourth Proportional to 128,922.66, 177,916.33 and 72,338.22

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Solution

The fourth proportional to 128,922.66, 177,916.33 and 72,338.22 is: 99,828.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,922.66 : 177,916.33 = 72,338.22 : x
  2. Step 2: Convert to fraction form
    128,922.66/177,916.33 = 72,338.22/x
  3. Step 3: Cross multiply
    128,922.66x = 177,916.33 × 72,338.22
  4. Step 4: Simplify right side
    128,922.66x = 12,870,149,731.55
  5. Step 5: Solve for x
    x = 12,870,149,731.55/128,922.66
  6. Step 6: Final answer
    x = 99,828.46

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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.