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Finding the Fourth Proportional to 121,293.80, 181,503.30 and 81,927.80

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Solution

The fourth proportional to 121,293.80, 181,503.30 and 81,927.80 is: 122,596.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,293.80 : 181,503.30 = 81,927.80 : x
  2. Step 2: Convert to fraction form
    121,293.80/181,503.30 = 81,927.80/x
  3. Step 3: Cross multiply
    121,293.80x = 181,503.30 × 81,927.80
  4. Step 4: Simplify right side
    121,293.80x = 14,870,166,061.74
  5. Step 5: Solve for x
    x = 14,870,166,061.74/121,293.80
  6. Step 6: Final answer
    x = 122,596.26

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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.