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Finding the Fourth Proportional to 51,210.60, 76,815.90 and 47,711.40

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Solution

The fourth proportional to 51,210.60, 76,815.90 and 47,711.40 is: 71,567.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,210.60 : 76,815.90 = 47,711.40 : x
  2. Step 2: Convert to fraction form
    51,210.60/76,815.90 = 47,711.40/x
  3. Step 3: Cross multiply
    51,210.60x = 76,815.90 × 47,711.40
  4. Step 4: Simplify right side
    51,210.60x = 3,664,994,131.26
  5. Step 5: Solve for x
    x = 3,664,994,131.26/51,210.60
  6. Step 6: Final answer
    x = 71,567.10

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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.