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Finding the Fourth Proportional to 67,679.40, 93,406.28 and 40,836.40

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Solution

The fourth proportional to 67,679.40, 93,406.28 and 40,836.40 is: 56,359.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,679.40 : 93,406.28 = 40,836.40 : x
  2. Step 2: Convert to fraction form
    67,679.40/93,406.28 = 40,836.40/x
  3. Step 3: Cross multiply
    67,679.40x = 93,406.28 × 40,836.40
  4. Step 4: Simplify right side
    67,679.40x = 3,814,376,212.59
  5. Step 5: Solve for x
    x = 3,814,376,212.59/67,679.40
  6. Step 6: Final answer
    x = 56,359.49

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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.