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Finding the Fourth Proportional to 148,718.52, 205,218.90 and 85,043.88

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Solution

The fourth proportional to 148,718.52, 205,218.90 and 85,043.88 is: 117,353.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,718.52 : 205,218.90 = 85,043.88 : x
  2. Step 2: Convert to fraction form
    148,718.52/205,218.90 = 85,043.88/x
  3. Step 3: Cross multiply
    148,718.52x = 205,218.90 × 85,043.88
  4. Step 4: Simplify right side
    148,718.52x = 17,452,611,505.33
  5. Step 5: Solve for x
    x = 17,452,611,505.33/148,718.52
  6. Step 6: Final answer
    x = 117,353.32

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1.5x scale

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.