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Finding the Fourth Proportional to 61,689.65, 85,136.75 and 34,838.69

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Solution

The fourth proportional to 61,689.65, 85,136.75 and 34,838.69 is: 48,080.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,689.65 : 85,136.75 = 34,838.69 : x
  2. Step 2: Convert to fraction form
    61,689.65/85,136.75 = 34,838.69/x
  3. Step 3: Cross multiply
    61,689.65x = 85,136.75 × 34,838.69
  4. Step 4: Simplify right side
    61,689.65x = 2,966,052,666.66
  5. Step 5: Solve for x
    x = 2,966,052,666.66/61,689.65
  6. Step 6: Final answer
    x = 48,080.23

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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.