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Finding the Fourth Proportional to 65,861.89, 90,888.61 and 35,646.49

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Solution

The fourth proportional to 65,861.89, 90,888.61 and 35,646.49 is: 49,191.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,861.89 : 90,888.61 = 35,646.49 : x
  2. Step 2: Convert to fraction form
    65,861.89/90,888.61 = 35,646.49/x
  3. Step 3: Cross multiply
    65,861.89x = 90,888.61 × 35,646.49
  4. Step 4: Simplify right side
    65,861.89x = 3,239,859,927.48
  5. Step 5: Solve for x
    x = 3,239,859,927.48/65,861.89
  6. Step 6: Final answer
    x = 49,191.72

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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.