Home / 128,585.10-177,442.33-71,995.26

Finding the Fourth Proportional to 128,585.10, 177,442.33 and 71,995.26

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Solution

The fourth proportional to 128,585.10, 177,442.33 and 71,995.26 is: 99,350.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,585.10 : 177,442.33 = 71,995.26 : x
  2. Step 2: Convert to fraction form
    128,585.10/177,442.33 = 71,995.26/x
  3. Step 3: Cross multiply
    128,585.10x = 177,442.33 × 71,995.26
  4. Step 4: Simplify right side
    128,585.10x = 12,775,006,683.36
  5. Step 5: Solve for x
    x = 12,775,006,683.36/128,585.10
  6. Step 6: Final answer
    x = 99,350.60

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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.