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Finding the Fourth Proportional to 71,329.60, 107,071.20 and 40,225.60

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Solution

The fourth proportional to 71,329.60, 107,071.20 and 40,225.60 is: 60,381.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,329.60 : 107,071.20 = 40,225.60 : x
  2. Step 2: Convert to fraction form
    71,329.60/107,071.20 = 40,225.60/x
  3. Step 3: Cross multiply
    71,329.60x = 107,071.20 × 40,225.60
  4. Step 4: Simplify right side
    71,329.60x = 4,307,003,262.72
  5. Step 5: Solve for x
    x = 4,307,003,262.72/71,329.60
  6. Step 6: Final answer
    x = 60,381.71

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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.