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Finding the Fourth Proportional to 71,277.10, 106,916.10 and 18,686.12

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Solution

The fourth proportional to 71,277.10, 106,916.10 and 18,686.12 is: 28,029.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,277.10 : 106,916.10 = 18,686.12 : x
  2. Step 2: Convert to fraction form
    71,277.10/106,916.10 = 18,686.12/x
  3. Step 3: Cross multiply
    71,277.10x = 106,916.10 × 18,686.12
  4. Step 4: Simplify right side
    71,277.10x = 1,997,847,074.53
  5. Step 5: Solve for x
    x = 1,997,847,074.53/71,277.10
  6. Step 6: Final answer
    x = 28,029.30

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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.