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Finding the Fourth Proportional to 228,076.60, 342,187.80 and 78,412.90

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Solution

The fourth proportional to 228,076.60, 342,187.80 and 78,412.90 is: 117,644.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,076.60 : 342,187.80 = 78,412.90 : x
  2. Step 2: Convert to fraction form
    228,076.60/342,187.80 = 78,412.90/x
  3. Step 3: Cross multiply
    228,076.60x = 342,187.80 × 78,412.90
  4. Step 4: Simplify right side
    228,076.60x = 26,831,937,742.62
  5. Step 5: Solve for x
    x = 26,831,937,742.62/228,076.60
  6. Step 6: Final answer
    x = 117,644.41

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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.