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Finding the Fourth Proportional to 120,765.60, 181,148.40 and 109,490.40

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Solution

The fourth proportional to 120,765.60, 181,148.40 and 109,490.40 is: 164,235.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,765.60 : 181,148.40 = 109,490.40 : x
  2. Step 2: Convert to fraction form
    120,765.60/181,148.40 = 109,490.40/x
  3. Step 3: Cross multiply
    120,765.60x = 181,148.40 × 109,490.40
  4. Step 4: Simplify right side
    120,765.60x = 19,834,010,775.36
  5. Step 5: Solve for x
    x = 19,834,010,775.36/120,765.60
  6. Step 6: Final answer
    x = 164,235.60

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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.