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Finding the Fourth Proportional to 121,330.65, 181,995.98 and 68,842.65

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Solution

The fourth proportional to 121,330.65, 181,995.98 and 68,842.65 is: 103,263.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,330.65 : 181,995.98 = 68,842.65 : x
  2. Step 2: Convert to fraction form
    121,330.65/181,995.98 = 68,842.65/x
  3. Step 3: Cross multiply
    121,330.65x = 181,995.98 × 68,842.65
  4. Step 4: Simplify right side
    121,330.65x = 12,529,085,208.33
  5. Step 5: Solve for x
    x = 12,529,085,208.33/121,330.65
  6. Step 6: Final answer
    x = 103,263.98

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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.