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Finding the Fourth Proportional to 218,005.17, 300,929.34 and 127,390.59

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Solution

The fourth proportional to 218,005.17, 300,929.34 and 127,390.59 is: 175,847.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,005.17 : 300,929.34 = 127,390.59 : x
  2. Step 2: Convert to fraction form
    218,005.17/300,929.34 = 127,390.59/x
  3. Step 3: Cross multiply
    218,005.17x = 300,929.34 × 127,390.59
  4. Step 4: Simplify right side
    218,005.17x = 38,335,566,170.91
  5. Step 5: Solve for x
    x = 38,335,566,170.91/218,005.17
  6. Step 6: Final answer
    x = 175,847.05

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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.