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Finding the Fourth Proportional to 138,040.45, 207,029.88 and 53,802.88

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Solution

The fourth proportional to 138,040.45, 207,029.88 and 53,802.88 is: 80,692.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,040.45 : 207,029.88 = 53,802.88 : x
  2. Step 2: Convert to fraction form
    138,040.45/207,029.88 = 53,802.88/x
  3. Step 3: Cross multiply
    138,040.45x = 207,029.88 × 53,802.88
  4. Step 4: Simplify right side
    138,040.45x = 11,138,803,272.48
  5. Step 5: Solve for x
    x = 11,138,803,272.48/138,040.45
  6. Step 6: Final answer
    x = 80,692.32

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1.5x scale

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.