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Finding the Fourth Proportional to 243,553.76, 365,367.12 and 85,754.40

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Solution

The fourth proportional to 243,553.76, 365,367.12 and 85,754.40 is: 128,644.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,553.76 : 365,367.12 = 85,754.40 : x
  2. Step 2: Convert to fraction form
    243,553.76/365,367.12 = 85,754.40/x
  3. Step 3: Cross multiply
    243,553.76x = 365,367.12 × 85,754.40
  4. Step 4: Simplify right side
    243,553.76x = 31,331,838,155.33
  5. Step 5: Solve for x
    x = 31,331,838,155.33/243,553.76
  6. Step 6: Final answer
    x = 128,644.44

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1.5x scale

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.