Home / 71,788.60-107,916.18-71,438.68

Finding the Fourth Proportional to 71,788.60, 107,916.18 and 71,438.68

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Solution

The fourth proportional to 71,788.60, 107,916.18 and 71,438.68 is: 107,390.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,788.60 : 107,916.18 = 71,438.68 : x
  2. Step 2: Convert to fraction form
    71,788.60/107,916.18 = 71,438.68/x
  3. Step 3: Cross multiply
    71,788.60x = 107,916.18 × 71,438.68
  4. Step 4: Simplify right side
    71,788.60x = 7,709,389,449.84
  5. Step 5: Solve for x
    x = 7,709,389,449.84/71,788.60
  6. Step 6: Final answer
    x = 107,390.16

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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.