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Finding the Fourth Proportional to 78,898.74, 108,881.12 and 43,089.80

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Solution

The fourth proportional to 78,898.74, 108,881.12 and 43,089.80 is: 59,464.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,898.74 : 108,881.12 = 43,089.80 : x
  2. Step 2: Convert to fraction form
    78,898.74/108,881.12 = 43,089.80/x
  3. Step 3: Cross multiply
    78,898.74x = 108,881.12 × 43,089.80
  4. Step 4: Simplify right side
    78,898.74x = 4,691,665,684.58
  5. Step 5: Solve for x
    x = 4,691,665,684.58/78,898.74
  6. Step 6: Final answer
    x = 59,464.39

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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.