Home / 71,145.18-106,643.97-31,720.86

Finding the Fourth Proportional to 71,145.18, 106,643.97 and 31,720.86

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Solution

The fourth proportional to 71,145.18, 106,643.97 and 31,720.86 is: 47,548.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,145.18 : 106,643.97 = 31,720.86 : x
  2. Step 2: Convert to fraction form
    71,145.18/106,643.97 = 31,720.86/x
  3. Step 3: Cross multiply
    71,145.18x = 106,643.97 × 31,720.86
  4. Step 4: Simplify right side
    71,145.18x = 3,382,838,442.21
  5. Step 5: Solve for x
    x = 3,382,838,442.21/71,145.18
  6. Step 6: Final answer
    x = 47,548.39

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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.