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Finding the Fourth Proportional to 71,637.20, 107,455.80 and 68,603.60

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Solution

The fourth proportional to 71,637.20, 107,455.80 and 68,603.60 is: 102,905.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,637.20 : 107,455.80 = 68,603.60 : x
  2. Step 2: Convert to fraction form
    71,637.20/107,455.80 = 68,603.60/x
  3. Step 3: Cross multiply
    71,637.20x = 107,455.80 × 68,603.60
  4. Step 4: Simplify right side
    71,637.20x = 7,371,854,720.88
  5. Step 5: Solve for x
    x = 7,371,854,720.88/71,637.20
  6. Step 6: Final answer
    x = 102,905.40

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1.5x scale

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.