Home / 128,269.43-177,012.92-71,684.45

Finding the Fourth Proportional to 128,269.43, 177,012.92 and 71,684.45

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Solution

The fourth proportional to 128,269.43, 177,012.92 and 71,684.45 is: 98,925.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,269.43 : 177,012.92 = 71,684.45 : x
  2. Step 2: Convert to fraction form
    128,269.43/177,012.92 = 71,684.45/x
  3. Step 3: Cross multiply
    128,269.43x = 177,012.92 × 71,684.45
  4. Step 4: Simplify right side
    128,269.43x = 12,689,073,454.67
  5. Step 5: Solve for x
    x = 12,689,073,454.67/128,269.43
  6. Step 6: Final answer
    x = 98,925.16

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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.