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Finding the Fourth Proportional to 121,223.79, 181,840.14 and 61,990.11

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Solution

The fourth proportional to 121,223.79, 181,840.14 and 61,990.11 is: 92,987.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,223.79 : 181,840.14 = 61,990.11 : x
  2. Step 2: Convert to fraction form
    121,223.79/181,840.14 = 61,990.11/x
  3. Step 3: Cross multiply
    121,223.79x = 181,840.14 × 61,990.11
  4. Step 4: Simplify right side
    121,223.79x = 11,272,290,281.02
  5. Step 5: Solve for x
    x = 11,272,290,281.02/121,223.79
  6. Step 6: Final answer
    x = 92,987.44

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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.