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Finding the Fourth Proportional to 159,319.88, 219,867.72 and 87,706.56

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Solution

The fourth proportional to 159,319.88, 219,867.72 and 87,706.56 is: 121,038.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,319.88 : 219,867.72 = 87,706.56 : x
  2. Step 2: Convert to fraction form
    159,319.88/219,867.72 = 87,706.56/x
  3. Step 3: Cross multiply
    159,319.88x = 219,867.72 × 87,706.56
  4. Step 4: Simplify right side
    159,319.88x = 19,283,841,871.85
  5. Step 5: Solve for x
    x = 19,283,841,871.85/159,319.88
  6. Step 6: Final answer
    x = 121,038.52

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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.