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Finding the Fourth Proportional to 78,342.34, 108,039 and 60,408.94

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Solution

The fourth proportional to 78,342.34, 108,039 and 60,408.94 is: 83,307.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,342.34 : 108,039 = 60,408.94 : x
  2. Step 2: Convert to fraction form
    78,342.34/108,039 = 60,408.94/x
  3. Step 3: Cross multiply
    78,342.34x = 108,039 × 60,408.94
  4. Step 4: Simplify right side
    78,342.34x = 6,526,521,468.66
  5. Step 5: Solve for x
    x = 6,526,521,468.66/78,342.34
  6. Step 6: Final answer
    x = 83,307.72

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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.