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Finding the Fourth Proportional to 92,602.90, 138,906.39 and 64,111.78

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Solution

The fourth proportional to 92,602.90, 138,906.39 and 64,111.78 is: 96,169.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,602.90 : 138,906.39 = 64,111.78 : x
  2. Step 2: Convert to fraction form
    92,602.90/138,906.39 = 64,111.78/x
  3. Step 3: Cross multiply
    92,602.90x = 138,906.39 × 64,111.78
  4. Step 4: Simplify right side
    92,602.90x = 8,905,535,916.27
  5. Step 5: Solve for x
    x = 8,905,535,916.27/92,602.90
  6. Step 6: Final answer
    x = 96,169.08

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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.