Home / 123,720.20-185,969.10-121,387.40

Finding the Fourth Proportional to 123,720.20, 185,969.10 and 121,387.40

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Solution

The fourth proportional to 123,720.20, 185,969.10 and 121,387.40 is: 182,462.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,720.20 : 185,969.10 = 121,387.40 : x
  2. Step 2: Convert to fraction form
    123,720.20/185,969.10 = 121,387.40/x
  3. Step 3: Cross multiply
    123,720.20x = 185,969.10 × 121,387.40
  4. Step 4: Simplify right side
    123,720.20x = 22,574,305,529.34
  5. Step 5: Solve for x
    x = 22,574,305,529.34/123,720.20
  6. Step 6: Final answer
    x = 182,462.57

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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.