Home / 138,143.02-190,621.94-77,712.42

Finding the Fourth Proportional to 138,143.02, 190,621.94 and 77,712.42

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Solution

The fourth proportional to 138,143.02, 190,621.94 and 77,712.42 is: 107,234.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,143.02 : 190,621.94 = 77,712.42 : x
  2. Step 2: Convert to fraction form
    138,143.02/190,621.94 = 77,712.42/x
  3. Step 3: Cross multiply
    138,143.02x = 190,621.94 × 77,712.42
  4. Step 4: Simplify right side
    138,143.02x = 14,813,692,262.49
  5. Step 5: Solve for x
    x = 14,813,692,262.49/138,143.02
  6. Step 6: Final answer
    x = 107,234.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.