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Finding the Fourth Proportional to 146,820.60, 220,230.90 and 76,721.40

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Solution

The fourth proportional to 146,820.60, 220,230.90 and 76,721.40 is: 115,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,820.60 : 220,230.90 = 76,721.40 : x
  2. Step 2: Convert to fraction form
    146,820.60/220,230.90 = 76,721.40/x
  3. Step 3: Cross multiply
    146,820.60x = 220,230.90 × 76,721.40
  4. Step 4: Simplify right side
    146,820.60x = 16,896,422,971.26
  5. Step 5: Solve for x
    x = 16,896,422,971.26/146,820.60
  6. Step 6: Final answer
    x = 115,082.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.