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Finding the Fourth Proportional to 159,003.16, 219,428.40 and 87,385

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Solution

The fourth proportional to 159,003.16, 219,428.40 and 87,385 is: 120,593.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,003.16 : 219,428.40 = 87,385 : x
  2. Step 2: Convert to fraction form
    159,003.16/219,428.40 = 87,385/x
  3. Step 3: Cross multiply
    159,003.16x = 219,428.40 × 87,385
  4. Step 4: Simplify right side
    159,003.16x = 19,174,750,734
  5. Step 5: Solve for x
    x = 19,174,750,734/159,003.16
  6. Step 6: Final answer
    x = 120,593.52

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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.