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Finding the Fourth Proportional to 159,031.89, 219,461.15 and 87,411.89

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Solution

The fourth proportional to 159,031.89, 219,461.15 and 87,411.89 is: 120,626.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,031.89 : 219,461.15 = 87,411.89 : x
  2. Step 2: Convert to fraction form
    159,031.89/219,461.15 = 87,411.89/x
  3. Step 3: Cross multiply
    159,031.89x = 219,461.15 × 87,411.89
  4. Step 4: Simplify right side
    159,031.89x = 19,183,512,368.71
  5. Step 5: Solve for x
    x = 19,183,512,368.71/159,031.89
  6. Step 6: Final answer
    x = 120,626.83

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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.