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Finding the Fourth Proportional to 121,225.20, 181,798.92 and 105,673.20

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Solution

The fourth proportional to 121,225.20, 181,798.92 and 105,673.20 is: 158,475.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,225.20 : 181,798.92 = 105,673.20 : x
  2. Step 2: Convert to fraction form
    121,225.20/181,798.92 = 105,673.20/x
  3. Step 3: Cross multiply
    121,225.20x = 181,798.92 × 105,673.20
  4. Step 4: Simplify right side
    121,225.20x = 19,211,273,632.94
  5. Step 5: Solve for x
    x = 19,211,273,632.94/121,225.20
  6. Step 6: Final answer
    x = 158,475.91

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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.