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Finding the Fourth Proportional to 121,307.48, 181,994.16 and 68,753.88

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Solution

The fourth proportional to 121,307.48, 181,994.16 and 68,753.88 is: 103,149.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,307.48 : 181,994.16 = 68,753.88 : x
  2. Step 2: Convert to fraction form
    121,307.48/181,994.16 = 68,753.88/x
  3. Step 3: Cross multiply
    121,307.48x = 181,994.16 × 68,753.88
  4. Step 4: Simplify right side
    121,307.48x = 12,512,804,637.34
  5. Step 5: Solve for x
    x = 12,512,804,637.34/121,307.48
  6. Step 6: Final answer
    x = 103,149.49

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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.