Home / 128,516.47-177,350.90-71,150.29

Finding the Fourth Proportional to 128,516.47, 177,350.90 and 71,150.29

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Solution

The fourth proportional to 128,516.47, 177,350.90 and 71,150.29 is: 98,186.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,516.47 : 177,350.90 = 71,150.29 : x
  2. Step 2: Convert to fraction form
    128,516.47/177,350.90 = 71,150.29/x
  3. Step 3: Cross multiply
    128,516.47x = 177,350.90 × 71,150.29
  4. Step 4: Simplify right side
    128,516.47x = 12,618,567,611.01
  5. Step 5: Solve for x
    x = 12,618,567,611.01/128,516.47
  6. Step 6: Final answer
    x = 98,186.39

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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.