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Finding the Fourth Proportional to 217,153.80, 325,730.70 and 138,616.20

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Solution

The fourth proportional to 217,153.80, 325,730.70 and 138,616.20 is: 207,924.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,153.80 : 325,730.70 = 138,616.20 : x
  2. Step 2: Convert to fraction form
    217,153.80/325,730.70 = 138,616.20/x
  3. Step 3: Cross multiply
    217,153.80x = 325,730.70 × 138,616.20
  4. Step 4: Simplify right side
    217,153.80x = 45,151,551,857.34
  5. Step 5: Solve for x
    x = 45,151,551,857.34/217,153.80
  6. Step 6: Final answer
    x = 207,924.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.