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Finding the Fourth Proportional to 78,985.56, 108,994.91 and 44,989.05

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Solution

The fourth proportional to 78,985.56, 108,994.91 and 44,989.05 is: 62,081.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,985.56 : 108,994.91 = 44,989.05 : x
  2. Step 2: Convert to fraction form
    78,985.56/108,994.91 = 44,989.05/x
  3. Step 3: Cross multiply
    78,985.56x = 108,994.91 × 44,989.05
  4. Step 4: Simplify right side
    78,985.56x = 4,903,577,230.79
  5. Step 5: Solve for x
    x = 4,903,577,230.79/78,985.56
  6. Step 6: Final answer
    x = 62,081.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.