Home / 128,442.50-177,246.62-71,078.36

Finding the Fourth Proportional to 128,442.50, 177,246.62 and 71,078.36

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Solution

The fourth proportional to 128,442.50, 177,246.62 and 71,078.36 is: 98,085.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,442.50 : 177,246.62 = 71,078.36 : x
  2. Step 2: Convert to fraction form
    128,442.50/177,246.62 = 71,078.36/x
  3. Step 3: Cross multiply
    128,442.50x = 177,246.62 × 71,078.36
  4. Step 4: Simplify right side
    128,442.50x = 12,598,399,065.14
  5. Step 5: Solve for x
    x = 12,598,399,065.14/128,442.50
  6. Step 6: Final answer
    x = 98,085.91

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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.