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Finding the Fourth Proportional to 120,843.40, 181,265.10 and 103,347.40

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Solution

The fourth proportional to 120,843.40, 181,265.10 and 103,347.40 is: 155,021.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,843.40 : 181,265.10 = 103,347.40 : x
  2. Step 2: Convert to fraction form
    120,843.40/181,265.10 = 103,347.40/x
  3. Step 3: Cross multiply
    120,843.40x = 181,265.10 × 103,347.40
  4. Step 4: Simplify right side
    120,843.40x = 18,733,276,795.74
  5. Step 5: Solve for x
    x = 18,733,276,795.74/120,843.40
  6. Step 6: Final answer
    x = 155,021.10

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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.