Home / 128,844.54-177,805.13-72,257.13

Finding the Fourth Proportional to 128,844.54, 177,805.13 and 72,257.13

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Solution

The fourth proportional to 128,844.54, 177,805.13 and 72,257.13 is: 99,714.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,844.54 : 177,805.13 = 72,257.13 : x
  2. Step 2: Convert to fraction form
    128,844.54/177,805.13 = 72,257.13/x
  3. Step 3: Cross multiply
    128,844.54x = 177,805.13 × 72,257.13
  4. Step 4: Simplify right side
    128,844.54x = 12,847,688,031.79
  5. Step 5: Solve for x
    x = 12,847,688,031.79/128,844.54
  6. Step 6: Final answer
    x = 99,714.65

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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.