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Finding the Fourth Proportional to 52,662.70, 78,840.45 and 47,133.10

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Solution

The fourth proportional to 52,662.70, 78,840.45 and 47,133.10 is: 70,562.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,662.70 : 78,840.45 = 47,133.10 : x
  2. Step 2: Convert to fraction form
    52,662.70/78,840.45 = 47,133.10/x
  3. Step 3: Cross multiply
    52,662.70x = 78,840.45 × 47,133.10
  4. Step 4: Simplify right side
    52,662.70x = 3,715,994,813.90
  5. Step 5: Solve for x
    x = 3,715,994,813.90/52,662.70
  6. Step 6: Final answer
    x = 70,562.18

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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.