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Finding the Fourth Proportional to 66,043.20, 99,077.60 and 28,603.20

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Solution

The fourth proportional to 66,043.20, 99,077.60 and 28,603.20 is: 42,910.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,043.20 : 99,077.60 = 28,603.20 : x
  2. Step 2: Convert to fraction form
    66,043.20/99,077.60 = 28,603.20/x
  3. Step 3: Cross multiply
    66,043.20x = 99,077.60 × 28,603.20
  4. Step 4: Simplify right side
    66,043.20x = 2,833,936,408.32
  5. Step 5: Solve for x
    x = 2,833,936,408.32/66,043.20
  6. Step 6: Final answer
    x = 42,910.34

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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.