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Finding the Fourth Proportional to 78,618.97, 108,496.13 and 42,810.93

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Solution

The fourth proportional to 78,618.97, 108,496.13 and 42,810.93 is: 59,080.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,618.97 : 108,496.13 = 42,810.93 : x
  2. Step 2: Convert to fraction form
    78,618.97/108,496.13 = 42,810.93/x
  3. Step 3: Cross multiply
    78,618.97x = 108,496.13 × 42,810.93
  4. Step 4: Simplify right side
    78,618.97x = 4,644,820,012.65
  5. Step 5: Solve for x
    x = 4,644,820,012.65/78,618.97
  6. Step 6: Final answer
    x = 59,080.14

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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.