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Finding the Fourth Proportional to 67,368.40, 101,135.80 and 42,408.40

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Solution

The fourth proportional to 67,368.40, 101,135.80 and 42,408.40 is: 63,664.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,368.40 : 101,135.80 = 42,408.40 : x
  2. Step 2: Convert to fraction form
    67,368.40/101,135.80 = 42,408.40/x
  3. Step 3: Cross multiply
    67,368.40x = 101,135.80 × 42,408.40
  4. Step 4: Simplify right side
    67,368.40x = 4,289,007,460.72
  5. Step 5: Solve for x
    x = 4,289,007,460.72/67,368.40
  6. Step 6: Final answer
    x = 63,664.97

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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.