Home / 128,511.27-177,345.53-71,922.65

Finding the Fourth Proportional to 128,511.27, 177,345.53 and 71,922.65

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Solution

The fourth proportional to 128,511.27, 177,345.53 and 71,922.65 is: 99,253.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,511.27 : 177,345.53 = 71,922.65 : x
  2. Step 2: Convert to fraction form
    128,511.27/177,345.53 = 71,922.65/x
  3. Step 3: Cross multiply
    128,511.27x = 177,345.53 × 71,922.65
  4. Step 4: Simplify right side
    128,511.27x = 12,755,159,236.91
  5. Step 5: Solve for x
    x = 12,755,159,236.91/128,511.27
  6. Step 6: Final answer
    x = 99,253.23

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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.