Home / 81,430.10-122,145.15-68,308.10

Finding the Fourth Proportional to 81,430.10, 122,145.15 and 68,308.10

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Solution

The fourth proportional to 81,430.10, 122,145.15 and 68,308.10 is: 102,462.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430.10 : 122,145.15 = 68,308.10 : x
  2. Step 2: Convert to fraction form
    81,430.10/122,145.15 = 68,308.10/x
  3. Step 3: Cross multiply
    81,430.10x = 122,145.15 × 68,308.10
  4. Step 4: Simplify right side
    81,430.10x = 8,343,503,120.72
  5. Step 5: Solve for x
    x = 8,343,503,120.72/81,430.10
  6. Step 6: Final answer
    x = 102,462.15

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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.