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Finding the Fourth Proportional to 78,882.56, 108,862.36 and 43,075.90

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Solution

The fourth proportional to 78,882.56, 108,862.36 and 43,075.90 is: 59,447.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,882.56 : 108,862.36 = 43,075.90 : x
  2. Step 2: Convert to fraction form
    78,882.56/108,862.36 = 43,075.90/x
  3. Step 3: Cross multiply
    78,882.56x = 108,862.36 × 43,075.90
  4. Step 4: Simplify right side
    78,882.56x = 4,689,344,133.12
  5. Step 5: Solve for x
    x = 4,689,344,133.12/78,882.56
  6. Step 6: Final answer
    x = 59,447.16

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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.