Home / 105,419.18-145,480.23-57,672.86

Finding the Fourth Proportional to 105,419.18, 145,480.23 and 57,672.86

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Solution

The fourth proportional to 105,419.18, 145,480.23 and 57,672.86 is: 79,589.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,419.18 : 145,480.23 = 57,672.86 : x
  2. Step 2: Convert to fraction form
    105,419.18/145,480.23 = 57,672.86/x
  3. Step 3: Cross multiply
    105,419.18x = 145,480.23 × 57,672.86
  4. Step 4: Simplify right side
    105,419.18x = 8,390,260,937.56
  5. Step 5: Solve for x
    x = 8,390,260,937.56/105,419.18
  6. Step 6: Final answer
    x = 79,589.51

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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.