Home / 138,912.48-208,394.64-45,423.36

Finding the Fourth Proportional to 138,912.48, 208,394.64 and 45,423.36

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Solution

The fourth proportional to 138,912.48, 208,394.64 and 45,423.36 is: 68,143.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,912.48 : 208,394.64 = 45,423.36 : x
  2. Step 2: Convert to fraction form
    138,912.48/208,394.64 = 45,423.36/x
  3. Step 3: Cross multiply
    138,912.48x = 208,394.64 × 45,423.36
  4. Step 4: Simplify right side
    138,912.48x = 9,465,984,754.79
  5. Step 5: Solve for x
    x = 9,465,984,754.79/138,912.48
  6. Step 6: Final answer
    x = 68,143.52

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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.