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Finding the Fourth Proportional to 124,143.78, 186,216.03 and 45,257.88

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Solution

The fourth proportional to 124,143.78, 186,216.03 and 45,257.88 is: 67,886.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,143.78 : 186,216.03 = 45,257.88 : x
  2. Step 2: Convert to fraction form
    124,143.78/186,216.03 = 45,257.88/x
  3. Step 3: Cross multiply
    124,143.78x = 186,216.03 × 45,257.88
  4. Step 4: Simplify right side
    124,143.78x = 8,427,742,739.82
  5. Step 5: Solve for x
    x = 8,427,742,739.82/124,143.78
  6. Step 6: Final answer
    x = 67,886.95

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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.