Home / 147,842.70-221,764.05-85,440.30

Finding the Fourth Proportional to 147,842.70, 221,764.05 and 85,440.30

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Solution

The fourth proportional to 147,842.70, 221,764.05 and 85,440.30 is: 128,160.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,842.70 : 221,764.05 = 85,440.30 : x
  2. Step 2: Convert to fraction form
    147,842.70/221,764.05 = 85,440.30/x
  3. Step 3: Cross multiply
    147,842.70x = 221,764.05 × 85,440.30
  4. Step 4: Simplify right side
    147,842.70x = 18,947,586,961.22
  5. Step 5: Solve for x
    x = 18,947,586,961.22/147,842.70
  6. Step 6: Final answer
    x = 128,160.45

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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.