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Finding the Fourth Proportional to 124,635.60, 186,931.80 and 45,709.20

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Solution

The fourth proportional to 124,635.60, 186,931.80 and 45,709.20 is: 68,555.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,635.60 : 186,931.80 = 45,709.20 : x
  2. Step 2: Convert to fraction form
    124,635.60/186,931.80 = 45,709.20/x
  3. Step 3: Cross multiply
    124,635.60x = 186,931.80 × 45,709.20
  4. Step 4: Simplify right side
    124,635.60x = 8,544,503,032.56
  5. Step 5: Solve for x
    x = 8,544,503,032.56/124,635.60
  6. Step 6: Final answer
    x = 68,555.88

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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.