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Finding the Fourth Proportional to 47,898.40, 71,847.60 and 42,066.40

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Solution

The fourth proportional to 47,898.40, 71,847.60 and 42,066.40 is: 63,099.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,898.40 : 71,847.60 = 42,066.40 : x
  2. Step 2: Convert to fraction form
    47,898.40/71,847.60 = 42,066.40/x
  3. Step 3: Cross multiply
    47,898.40x = 71,847.60 × 42,066.40
  4. Step 4: Simplify right side
    47,898.40x = 3,022,369,880.64
  5. Step 5: Solve for x
    x = 3,022,369,880.64/47,898.40
  6. Step 6: Final answer
    x = 63,099.60

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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.