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Finding the Fourth Proportional to 148,912.40, 223,368.60 and 85,708.10

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Solution

The fourth proportional to 148,912.40, 223,368.60 and 85,708.10 is: 128,562.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,912.40 : 223,368.60 = 85,708.10 : x
  2. Step 2: Convert to fraction form
    148,912.40/223,368.60 = 85,708.10/x
  3. Step 3: Cross multiply
    148,912.40x = 223,368.60 × 85,708.10
  4. Step 4: Simplify right side
    148,912.40x = 19,144,498,305.66
  5. Step 5: Solve for x
    x = 19,144,498,305.66/148,912.40
  6. Step 6: Final answer
    x = 128,562.15

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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.