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Finding the Fourth Proportional to 66,934.20, 92,389.50 and 38,659.80

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Solution

The fourth proportional to 66,934.20, 92,389.50 and 38,659.80 is: 53,362.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,934.20 : 92,389.50 = 38,659.80 : x
  2. Step 2: Convert to fraction form
    66,934.20/92,389.50 = 38,659.80/x
  3. Step 3: Cross multiply
    66,934.20x = 92,389.50 × 38,659.80
  4. Step 4: Simplify right side
    66,934.20x = 3,571,759,592.10
  5. Step 5: Solve for x
    x = 3,571,759,592.10/66,934.20
  6. Step 6: Final answer
    x = 53,362.25

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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.