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Finding the Fourth Proportional to 124,437.60, 186,634.80 and 45,511.20

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Solution

The fourth proportional to 124,437.60, 186,634.80 and 45,511.20 is: 68,258.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,437.60 : 186,634.80 = 45,511.20 : x
  2. Step 2: Convert to fraction form
    124,437.60/186,634.80 = 45,511.20/x
  3. Step 3: Cross multiply
    124,437.60x = 186,634.80 × 45,511.20
  4. Step 4: Simplify right side
    124,437.60x = 8,493,973,709.76
  5. Step 5: Solve for x
    x = 8,493,973,709.76/124,437.60
  6. Step 6: Final answer
    x = 68,258.90

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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.