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Finding the Fourth Proportional to 217,776.65, 300,479.19 and 127,080.86

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Solution

The fourth proportional to 217,776.65, 300,479.19 and 127,080.86 is: 175,340.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,776.65 : 300,479.19 = 127,080.86 : x
  2. Step 2: Convert to fraction form
    217,776.65/300,479.19 = 127,080.86/x
  3. Step 3: Cross multiply
    217,776.65x = 300,479.19 × 127,080.86
  4. Step 4: Simplify right side
    217,776.65x = 38,185,152,374.91
  5. Step 5: Solve for x
    x = 38,185,152,374.91/217,776.65
  6. Step 6: Final answer
    x = 175,340.90

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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.