Home / 128,515.47-177,349.52-71,149.29

Finding the Fourth Proportional to 128,515.47, 177,349.52 and 71,149.29

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Solution

The fourth proportional to 128,515.47, 177,349.52 and 71,149.29 is: 98,185.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,515.47 : 177,349.52 = 71,149.29 : x
  2. Step 2: Convert to fraction form
    128,515.47/177,349.52 = 71,149.29/x
  3. Step 3: Cross multiply
    128,515.47x = 177,349.52 × 71,149.29
  4. Step 4: Simplify right side
    128,515.47x = 12,618,292,074.09
  5. Step 5: Solve for x
    x = 12,618,292,074.09/128,515.47
  6. Step 6: Final answer
    x = 98,185.01

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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.