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Finding the Fourth Proportional to 64,236, 88,700.40 and 40,402.56

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Solution

The fourth proportional to 64,236, 88,700.40 and 40,402.56 is: 55,789.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,236 : 88,700.40 = 40,402.56 : x
  2. Step 2: Convert to fraction form
    64,236/88,700.40 = 40,402.56/x
  3. Step 3: Cross multiply
    64,236x = 88,700.40 × 40,402.56
  4. Step 4: Simplify right side
    64,236x = 3,583,723,233.02
  5. Step 5: Solve for x
    x = 3,583,723,233.02/64,236
  6. Step 6: Final answer
    x = 55,789.95

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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.