Home / 78,419.08-117,562.50-34,012.40

Finding the Fourth Proportional to 78,419.08, 117,562.50 and 34,012.40

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Solution

The fourth proportional to 78,419.08, 117,562.50 and 34,012.40 is: 50,989.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,419.08 : 117,562.50 = 34,012.40 : x
  2. Step 2: Convert to fraction form
    78,419.08/117,562.50 = 34,012.40/x
  3. Step 3: Cross multiply
    78,419.08x = 117,562.50 × 34,012.40
  4. Step 4: Simplify right side
    78,419.08x = 3,998,582,775
  5. Step 5: Solve for x
    x = 3,998,582,775/78,419.08
  6. Step 6: Final answer
    x = 50,989.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.