Home / 138,080.36-207,121.02-42,018.50

Finding the Fourth Proportional to 138,080.36, 207,121.02 and 42,018.50

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Solution

The fourth proportional to 138,080.36, 207,121.02 and 42,018.50 is: 63,027.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,080.36 : 207,121.02 = 42,018.50 : x
  2. Step 2: Convert to fraction form
    138,080.36/207,121.02 = 42,018.50/x
  3. Step 3: Cross multiply
    138,080.36x = 207,121.02 × 42,018.50
  4. Step 4: Simplify right side
    138,080.36x = 8,702,914,578.87
  5. Step 5: Solve for x
    x = 8,702,914,578.87/138,080.36
  6. Step 6: Final answer
    x = 63,027.90

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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.