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Finding the Fourth Proportional to 158,730.76, 219,053.78 and 87,114.75

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Solution

The fourth proportional to 158,730.76, 219,053.78 and 87,114.75 is: 120,221.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,730.76 : 219,053.78 = 87,114.75 : x
  2. Step 2: Convert to fraction form
    158,730.76/219,053.78 = 87,114.75/x
  3. Step 3: Cross multiply
    158,730.76x = 219,053.78 × 87,114.75
  4. Step 4: Simplify right side
    158,730.76x = 19,082,815,281.26
  5. Step 5: Solve for x
    x = 19,082,815,281.26/158,730.76
  6. Step 6: Final answer
    x = 120,221.28

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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.