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Finding the Fourth Proportional to 120,881.60, 181,322.40 and 42,003.80

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Solution

The fourth proportional to 120,881.60, 181,322.40 and 42,003.80 is: 63,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,881.60 : 181,322.40 = 42,003.80 : x
  2. Step 2: Convert to fraction form
    120,881.60/181,322.40 = 42,003.80/x
  3. Step 3: Cross multiply
    120,881.60x = 181,322.40 × 42,003.80
  4. Step 4: Simplify right side
    120,881.60x = 7,616,229,825.12
  5. Step 5: Solve for x
    x = 7,616,229,825.12/120,881.60
  6. Step 6: Final answer
    x = 63,005.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.