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Finding the Fourth Proportional to 217,663.91, 300,359.71 and 122,152.15

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Solution

The fourth proportional to 217,663.91, 300,359.71 and 122,152.15 is: 168,560.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,663.91 : 300,359.71 = 122,152.15 : x
  2. Step 2: Convert to fraction form
    217,663.91/300,359.71 = 122,152.15/x
  3. Step 3: Cross multiply
    217,663.91x = 300,359.71 × 122,152.15
  4. Step 4: Simplify right side
    217,663.91x = 36,689,584,878.02
  5. Step 5: Solve for x
    x = 36,689,584,878.02/217,663.91
  6. Step 6: Final answer
    x = 168,560.72

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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.