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Finding the Fourth Proportional to 61,718.65, 85,171.79 and 34,861.21

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Solution

The fourth proportional to 61,718.65, 85,171.79 and 34,861.21 is: 48,108.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,718.65 : 85,171.79 = 34,861.21 : x
  2. Step 2: Convert to fraction form
    61,718.65/85,171.79 = 34,861.21/x
  3. Step 3: Cross multiply
    61,718.65x = 85,171.79 × 34,861.21
  4. Step 4: Simplify right side
    61,718.65x = 2,969,191,482.96
  5. Step 5: Solve for x
    x = 2,969,191,482.96/61,718.65
  6. Step 6: Final answer
    x = 48,108.50

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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.