Home / 78,316.10-108,075.17-42,505.80

Finding the Fourth Proportional to 78,316.10, 108,075.17 and 42,505.80

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Solution

The fourth proportional to 78,316.10, 108,075.17 and 42,505.80 is: 58,657.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,316.10 : 108,075.17 = 42,505.80 : x
  2. Step 2: Convert to fraction form
    78,316.10/108,075.17 = 42,505.80/x
  3. Step 3: Cross multiply
    78,316.10x = 108,075.17 × 42,505.80
  4. Step 4: Simplify right side
    78,316.10x = 4,593,821,560.99
  5. Step 5: Solve for x
    x = 4,593,821,560.99/78,316.10
  6. Step 6: Final answer
    x = 58,657.44

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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.