Home / 121,319.20-181,784.40-76,866.40

Finding the Fourth Proportional to 121,319.20, 181,784.40 and 76,866.40

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Solution

The fourth proportional to 121,319.20, 181,784.40 and 76,866.40 is: 115,176.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,319.20 : 181,784.40 = 76,866.40 : x
  2. Step 2: Convert to fraction form
    121,319.20/181,784.40 = 76,866.40/x
  3. Step 3: Cross multiply
    121,319.20x = 181,784.40 × 76,866.40
  4. Step 4: Simplify right side
    121,319.20x = 13,973,112,404.16
  5. Step 5: Solve for x
    x = 13,973,112,404.16/121,319.20
  6. Step 6: Final answer
    x = 115,176.43

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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.