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Finding the Fourth Proportional to 78,585.60, 108,450.99 and 42,773.88

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Solution

The fourth proportional to 78,585.60, 108,450.99 and 42,773.88 is: 59,029.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,585.60 : 108,450.99 = 42,773.88 : x
  2. Step 2: Convert to fraction form
    78,585.60/108,450.99 = 42,773.88/x
  3. Step 3: Cross multiply
    78,585.60x = 108,450.99 × 42,773.88
  4. Step 4: Simplify right side
    78,585.60x = 4,638,869,632.14
  5. Step 5: Solve for x
    x = 4,638,869,632.14/78,585.60
  6. Step 6: Final answer
    x = 59,029.51

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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.