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Finding the Fourth Proportional to 67,376.70, 100,869.36 and 39,210.84

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Solution

The fourth proportional to 67,376.70, 100,869.36 and 39,210.84 is: 58,702.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,376.70 : 100,869.36 = 39,210.84 : x
  2. Step 2: Convert to fraction form
    67,376.70/100,869.36 = 39,210.84/x
  3. Step 3: Cross multiply
    67,376.70x = 100,869.36 × 39,210.84
  4. Step 4: Simplify right side
    67,376.70x = 3,955,172,335.86
  5. Step 5: Solve for x
    x = 3,955,172,335.86/67,376.70
  6. Step 6: Final answer
    x = 58,702.38

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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.