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Finding the Fourth Proportional to 71,855.60, 107,746.35 and 38,603.60

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Solution

The fourth proportional to 71,855.60, 107,746.35 and 38,603.60 is: 57,885.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,855.60 : 107,746.35 = 38,603.60 : x
  2. Step 2: Convert to fraction form
    71,855.60/107,746.35 = 38,603.60/x
  3. Step 3: Cross multiply
    71,855.60x = 107,746.35 × 38,603.60
  4. Step 4: Simplify right side
    71,855.60x = 4,159,396,996.86
  5. Step 5: Solve for x
    x = 4,159,396,996.86/71,855.60
  6. Step 6: Final answer
    x = 57,885.50

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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.