Home / 78,432.02-108,249.09-57,281.30

Finding the Fourth Proportional to 78,432.02, 108,249.09 and 57,281.30

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Solution

The fourth proportional to 78,432.02, 108,249.09 and 57,281.30 is: 79,057.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,432.02 : 108,249.09 = 57,281.30 : x
  2. Step 2: Convert to fraction form
    78,432.02/108,249.09 = 57,281.30/x
  3. Step 3: Cross multiply
    78,432.02x = 108,249.09 × 57,281.30
  4. Step 4: Simplify right side
    78,432.02x = 6,200,648,599.02
  5. Step 5: Solve for x
    x = 6,200,648,599.02/78,432.02
  6. Step 6: Final answer
    x = 79,057.62

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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.