Home / 128,452.56-177,275.16-71,869.20

Finding the Fourth Proportional to 128,452.56, 177,275.16 and 71,869.20

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Solution

The fourth proportional to 128,452.56, 177,275.16 and 71,869.20 is: 99,185.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,452.56 : 177,275.16 = 71,869.20 : x
  2. Step 2: Convert to fraction form
    128,452.56/177,275.16 = 71,869.20/x
  3. Step 3: Cross multiply
    128,452.56x = 177,275.16 × 71,869.20
  4. Step 4: Simplify right side
    128,452.56x = 12,740,623,929.07
  5. Step 5: Solve for x
    x = 12,740,623,929.07/128,452.56
  6. Step 6: Final answer
    x = 99,185.44

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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.