Home / 121,287.51-181,964.10-68,733.90

Finding the Fourth Proportional to 121,287.51, 181,964.10 and 68,733.90

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Solution

The fourth proportional to 121,287.51, 181,964.10 and 68,733.90 is: 103,119.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,287.51 : 181,964.10 = 68,733.90 : x
  2. Step 2: Convert to fraction form
    121,287.51/181,964.10 = 68,733.90/x
  3. Step 3: Cross multiply
    121,287.51x = 181,964.10 × 68,733.90
  4. Step 4: Simplify right side
    121,287.51x = 12,507,102,252.99
  5. Step 5: Solve for x
    x = 12,507,102,252.99/121,287.51
  6. Step 6: Final answer
    x = 103,119.46

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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.