Home / 128,319.39-177,084.68-71,733.15

Finding the Fourth Proportional to 128,319.39, 177,084.68 and 71,733.15

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Solution

The fourth proportional to 128,319.39, 177,084.68 and 71,733.15 is: 98,993.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,319.39 : 177,084.68 = 71,733.15 : x
  2. Step 2: Convert to fraction form
    128,319.39/177,084.68 = 71,733.15/x
  3. Step 3: Cross multiply
    128,319.39x = 177,084.68 × 71,733.15
  4. Step 4: Simplify right side
    128,319.39x = 12,702,841,554.48
  5. Step 5: Solve for x
    x = 12,702,841,554.48/128,319.39
  6. Step 6: Final answer
    x = 98,993.94

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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.