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Finding the Fourth Proportional to 67,290, 92,860.20 and 39,012.10

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Solution

The fourth proportional to 67,290, 92,860.20 and 39,012.10 is: 53,836.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,290 : 92,860.20 = 39,012.10 : x
  2. Step 2: Convert to fraction form
    67,290/92,860.20 = 39,012.10/x
  3. Step 3: Cross multiply
    67,290x = 92,860.20 × 39,012.10
  4. Step 4: Simplify right side
    67,290x = 3,622,671,408.42
  5. Step 5: Solve for x
    x = 3,622,671,408.42/67,290
  6. Step 6: Final answer
    x = 53,836.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.