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Finding the Fourth Proportional to 159,300.61, 219,834.90 and 87,680.12

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Solution

The fourth proportional to 159,300.61, 219,834.90 and 87,680.12 is: 120,998.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,300.61 : 219,834.90 = 87,680.12 : x
  2. Step 2: Convert to fraction form
    159,300.61/219,834.90 = 87,680.12/x
  3. Step 3: Cross multiply
    159,300.61x = 219,834.90 × 87,680.12
  4. Step 4: Simplify right side
    159,300.61x = 19,275,150,412.19
  5. Step 5: Solve for x
    x = 19,275,150,412.19/159,300.61
  6. Step 6: Final answer
    x = 120,998.60

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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.