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Finding the Fourth Proportional to 215,680.40, 323,812.20 and 136,948.40

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Solution

The fourth proportional to 215,680.40, 323,812.20 and 136,948.40 is: 205,607.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,680.40 : 323,812.20 = 136,948.40 : x
  2. Step 2: Convert to fraction form
    215,680.40/323,812.20 = 136,948.40/x
  3. Step 3: Cross multiply
    215,680.40x = 323,812.20 × 136,948.40
  4. Step 4: Simplify right side
    215,680.40x = 44,345,562,690.48
  5. Step 5: Solve for x
    x = 44,345,562,690.48/215,680.40
  6. Step 6: Final answer
    x = 205,607.75

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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.