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Finding the Fourth Proportional to 159,351.65, 219,901.01 and 87,732.21

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Solution

The fourth proportional to 159,351.65, 219,901.01 and 87,732.21 is: 121,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,351.65 : 219,901.01 = 87,732.21 : x
  2. Step 2: Convert to fraction form
    159,351.65/219,901.01 = 87,732.21/x
  3. Step 3: Cross multiply
    159,351.65x = 219,901.01 × 87,732.21
  4. Step 4: Simplify right side
    159,351.65x = 19,292,401,149.87
  5. Step 5: Solve for x
    x = 19,292,401,149.87/159,351.65
  6. Step 6: Final answer
    x = 121,068.10

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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.