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Finding the Fourth Proportional to 67,123.62, 100,702.52 and 19,740.40

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Solution

The fourth proportional to 67,123.62, 100,702.52 and 19,740.40 is: 29,615.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,123.62 : 100,702.52 = 19,740.40 : x
  2. Step 2: Convert to fraction form
    67,123.62/100,702.52 = 19,740.40/x
  3. Step 3: Cross multiply
    67,123.62x = 100,702.52 × 19,740.40
  4. Step 4: Simplify right side
    67,123.62x = 1,987,908,025.81
  5. Step 5: Solve for x
    x = 1,987,908,025.81/67,123.62
  6. Step 6: Final answer
    x = 29,615.63

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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.