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Finding the Fourth Proportional to 120,615.66, 166,506.75 and 80,396.46

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Solution

The fourth proportional to 120,615.66, 166,506.75 and 80,396.46 is: 110,985.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,615.66 : 166,506.75 = 80,396.46 : x
  2. Step 2: Convert to fraction form
    120,615.66/166,506.75 = 80,396.46/x
  3. Step 3: Cross multiply
    120,615.66x = 166,506.75 × 80,396.46
  4. Step 4: Simplify right side
    120,615.66x = 13,386,553,266.11
  5. Step 5: Solve for x
    x = 13,386,553,266.11/120,615.66
  6. Step 6: Final answer
    x = 110,985.20

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1.5x scale

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.