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Finding the Fourth Proportional to 158,728.17, 219,047.52 and 87,114.87

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Solution

The fourth proportional to 158,728.17, 219,047.52 and 87,114.87 is: 120,219.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,728.17 : 219,047.52 = 87,114.87 : x
  2. Step 2: Convert to fraction form
    158,728.17/219,047.52 = 87,114.87/x
  3. Step 3: Cross multiply
    158,728.17x = 219,047.52 × 87,114.87
  4. Step 4: Simplify right side
    158,728.17x = 19,082,296,228.62
  5. Step 5: Solve for x
    x = 19,082,296,228.62/158,728.17
  6. Step 6: Final answer
    x = 120,219.97

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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.