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Finding the Fourth Proportional to 66,893.28, 100,356.64 and 47,210.28

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Solution

The fourth proportional to 66,893.28, 100,356.64 and 47,210.28 is: 70,827.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,893.28 : 100,356.64 = 47,210.28 : x
  2. Step 2: Convert to fraction form
    66,893.28/100,356.64 = 47,210.28/x
  3. Step 3: Cross multiply
    66,893.28x = 100,356.64 × 47,210.28
  4. Step 4: Simplify right side
    66,893.28x = 4,737,864,579.90
  5. Step 5: Solve for x
    x = 4,737,864,579.90/66,893.28
  6. Step 6: Final answer
    x = 70,827.22

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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.