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Finding the Fourth Proportional to 120,877.80, 166,763.60 and 69,881.15

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Solution

The fourth proportional to 120,877.80, 166,763.60 and 69,881.15 is: 96,408.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,877.80 : 166,763.60 = 69,881.15 : x
  2. Step 2: Convert to fraction form
    120,877.80/166,763.60 = 69,881.15/x
  3. Step 3: Cross multiply
    120,877.80x = 166,763.60 × 69,881.15
  4. Step 4: Simplify right side
    120,877.80x = 11,653,630,962.92
  5. Step 5: Solve for x
    x = 11,653,630,962.92/120,877.80
  6. Step 6: Final answer
    x = 96,408.36

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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.