Home / 78,316.11-108,075.18-42,505.80

Finding the Fourth Proportional to 78,316.11, 108,075.18 and 42,505.80

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Solution

The fourth proportional to 78,316.11, 108,075.18 and 42,505.80 is: 58,657.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,316.11 : 108,075.18 = 42,505.80 : x
  2. Step 2: Convert to fraction form
    78,316.11/108,075.18 = 42,505.80/x
  3. Step 3: Cross multiply
    78,316.11x = 108,075.18 × 42,505.80
  4. Step 4: Simplify right side
    78,316.11x = 4,593,821,773.52
  5. Step 5: Solve for x
    x = 4,593,821,773.52/78,316.11
  6. Step 6: Final answer
    x = 58,657.43

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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.