Home / 121,281.10-181,921.65-115,837.90

Finding the Fourth Proportional to 121,281.10, 181,921.65 and 115,837.90

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Solution

The fourth proportional to 121,281.10, 181,921.65 and 115,837.90 is: 173,756.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,281.10 : 181,921.65 = 115,837.90 : x
  2. Step 2: Convert to fraction form
    121,281.10/181,921.65 = 115,837.90/x
  3. Step 3: Cross multiply
    121,281.10x = 181,921.65 × 115,837.90
  4. Step 4: Simplify right side
    121,281.10x = 21,073,421,900.54
  5. Step 5: Solve for x
    x = 21,073,421,900.54/121,281.10
  6. Step 6: Final answer
    x = 173,756.85

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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.