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Finding the Fourth Proportional to 67,690.87, 93,437.93 and 39,396.56

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Solution

The fourth proportional to 67,690.87, 93,437.93 and 39,396.56 is: 54,381.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,690.87 : 93,437.93 = 39,396.56 : x
  2. Step 2: Convert to fraction form
    67,690.87/93,437.93 = 39,396.56/x
  3. Step 3: Cross multiply
    67,690.87x = 93,437.93 × 39,396.56
  4. Step 4: Simplify right side
    67,690.87x = 3,681,132,818.54
  5. Step 5: Solve for x
    x = 3,681,132,818.54/67,690.87
  6. Step 6: Final answer
    x = 54,381.53

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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.