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Finding the Fourth Proportional to 64,869.50, 89,519.92 and 35,061.50

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Solution

The fourth proportional to 64,869.50, 89,519.92 and 35,061.50 is: 48,384.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,869.50 : 89,519.92 = 35,061.50 : x
  2. Step 2: Convert to fraction form
    64,869.50/89,519.92 = 35,061.50/x
  3. Step 3: Cross multiply
    64,869.50x = 89,519.92 × 35,061.50
  4. Step 4: Simplify right side
    64,869.50x = 3,138,702,675.08
  5. Step 5: Solve for x
    x = 3,138,702,675.08/64,869.50
  6. Step 6: Final answer
    x = 48,384.88

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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.