Home / 109,740.40-151,452.90-79,138.66

Finding the Fourth Proportional to 109,740.40, 151,452.90 and 79,138.66

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Solution

The fourth proportional to 109,740.40, 151,452.90 and 79,138.66 is: 109,219.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,740.40 : 151,452.90 = 79,138.66 : x
  2. Step 2: Convert to fraction form
    109,740.40/151,452.90 = 79,138.66/x
  3. Step 3: Cross multiply
    109,740.40x = 151,452.90 × 79,138.66
  4. Step 4: Simplify right side
    109,740.40x = 11,985,779,559.11
  5. Step 5: Solve for x
    x = 11,985,779,559.11/109,740.40
  6. Step 6: Final answer
    x = 109,219.39

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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.