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Finding the Fourth Proportional to 99,801.40, 149,702.10 and 68,308.60

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Solution

The fourth proportional to 99,801.40, 149,702.10 and 68,308.60 is: 102,462.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,801.40 : 149,702.10 = 68,308.60 : x
  2. Step 2: Convert to fraction form
    99,801.40/149,702.10 = 68,308.60/x
  3. Step 3: Cross multiply
    99,801.40x = 149,702.10 × 68,308.60
  4. Step 4: Simplify right side
    99,801.40x = 10,225,940,868.06
  5. Step 5: Solve for x
    x = 10,225,940,868.06/99,801.40
  6. Step 6: Final answer
    x = 102,462.90

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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.