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Finding the Fourth Proportional to 159,031.74, 219,469.56 and 87,417.20

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Solution

The fourth proportional to 159,031.74, 219,469.56 and 87,417.20 is: 120,638.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,031.74 : 219,469.56 = 87,417.20 : x
  2. Step 2: Convert to fraction form
    159,031.74/219,469.56 = 87,417.20/x
  3. Step 3: Cross multiply
    159,031.74x = 219,469.56 × 87,417.20
  4. Step 4: Simplify right side
    159,031.74x = 19,185,414,420.43
  5. Step 5: Solve for x
    x = 19,185,414,420.43/159,031.74
  6. Step 6: Final answer
    x = 120,638.90

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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.