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Finding the Fourth Proportional to 66,230.60, 99,288.30 and 39,907.40

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Solution

The fourth proportional to 66,230.60, 99,288.30 and 39,907.40 is: 59,826.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,230.60 : 99,288.30 = 39,907.40 : x
  2. Step 2: Convert to fraction form
    66,230.60/99,288.30 = 39,907.40/x
  3. Step 3: Cross multiply
    66,230.60x = 99,288.30 × 39,907.40
  4. Step 4: Simplify right side
    66,230.60x = 3,962,337,903.42
  5. Step 5: Solve for x
    x = 3,962,337,903.42/66,230.60
  6. Step 6: Final answer
    x = 59,826.39

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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.