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Finding the Fourth Proportional to 66,863.70, 92,259.81 and 42,984.90

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Solution

The fourth proportional to 66,863.70, 92,259.81 and 42,984.90 is: 59,311.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,863.70 : 92,259.81 = 42,984.90 : x
  2. Step 2: Convert to fraction form
    66,863.70/92,259.81 = 42,984.90/x
  3. Step 3: Cross multiply
    66,863.70x = 92,259.81 × 42,984.90
  4. Step 4: Simplify right side
    66,863.70x = 3,965,778,706.87
  5. Step 5: Solve for x
    x = 3,965,778,706.87/66,863.70
  6. Step 6: Final answer
    x = 59,311.39

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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.