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Finding the Fourth Proportional to 121,116.87, 181,712.16 and 61,994.03

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Solution

The fourth proportional to 121,116.87, 181,712.16 and 61,994.03 is: 93,009.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,116.87 : 181,712.16 = 61,994.03 : x
  2. Step 2: Convert to fraction form
    121,116.87/181,712.16 = 61,994.03/x
  3. Step 3: Cross multiply
    121,116.87x = 181,712.16 × 61,994.03
  4. Step 4: Simplify right side
    121,116.87x = 11,265,068,189.84
  5. Step 5: Solve for x
    x = 11,265,068,189.84/121,116.87
  6. Step 6: Final answer
    x = 93,009.90

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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.