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Finding the Fourth Proportional to 120,325.80, 166,051.56 and 65,877.06

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Solution

The fourth proportional to 120,325.80, 166,051.56 and 65,877.06 is: 90,911.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,325.80 : 166,051.56 = 65,877.06 : x
  2. Step 2: Convert to fraction form
    120,325.80/166,051.56 = 65,877.06/x
  3. Step 3: Cross multiply
    120,325.80x = 166,051.56 × 65,877.06
  4. Step 4: Simplify right side
    120,325.80x = 10,938,987,864.61
  5. Step 5: Solve for x
    x = 10,938,987,864.61/120,325.80
  6. Step 6: Final answer
    x = 90,911.41

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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.