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Finding the Fourth Proportional to 158,987.34, 219,402.54 and 87,372

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Solution

The fourth proportional to 158,987.34, 219,402.54 and 87,372 is: 120,573.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,987.34 : 219,402.54 = 87,372 : x
  2. Step 2: Convert to fraction form
    158,987.34/219,402.54 = 87,372/x
  3. Step 3: Cross multiply
    158,987.34x = 219,402.54 × 87,372
  4. Step 4: Simplify right side
    158,987.34x = 19,169,638,724.88
  5. Step 5: Solve for x
    x = 19,169,638,724.88/158,987.34
  6. Step 6: Final answer
    x = 120,573.37

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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.