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Finding the Fourth Proportional to 78,600.61, 117,860.86 and 38,622.25

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Solution

The fourth proportional to 78,600.61, 117,860.86 and 38,622.25 is: 57,913.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,600.61 : 117,860.86 = 38,622.25 : x
  2. Step 2: Convert to fraction form
    78,600.61/117,860.86 = 38,622.25/x
  3. Step 3: Cross multiply
    78,600.61x = 117,860.86 × 38,622.25
  4. Step 4: Simplify right side
    78,600.61x = 4,552,051,600.14
  5. Step 5: Solve for x
    x = 4,552,051,600.14/78,600.61
  6. Step 6: Final answer
    x = 57,913.69

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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.