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Finding the Fourth Proportional to 66,702.60, 100,019.70 and 19,949.40

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Solution

The fourth proportional to 66,702.60, 100,019.70 and 19,949.40 is: 29,913.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,702.60 : 100,019.70 = 19,949.40 : x
  2. Step 2: Convert to fraction form
    66,702.60/100,019.70 = 19,949.40/x
  3. Step 3: Cross multiply
    66,702.60x = 100,019.70 × 19,949.40
  4. Step 4: Simplify right side
    66,702.60x = 1,995,333,003.18
  5. Step 5: Solve for x
    x = 1,995,333,003.18/66,702.60
  6. Step 6: Final answer
    x = 29,913.87

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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.