Home / 128,002.90-192,004.35-81,462.10

Finding the Fourth Proportional to 128,002.90, 192,004.35 and 81,462.10

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Solution

The fourth proportional to 128,002.90, 192,004.35 and 81,462.10 is: 122,193.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,002.90 : 192,004.35 = 81,462.10 : x
  2. Step 2: Convert to fraction form
    128,002.90/192,004.35 = 81,462.10/x
  3. Step 3: Cross multiply
    128,002.90x = 192,004.35 × 81,462.10
  4. Step 4: Simplify right side
    128,002.90x = 15,641,077,560.14
  5. Step 5: Solve for x
    x = 15,641,077,560.14/128,002.90
  6. Step 6: Final answer
    x = 122,193.15

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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.