Home / 52,087.52-78,130.70-12,644.63

Finding the Fourth Proportional to 52,087.52, 78,130.70 and 12,644.63

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Solution

The fourth proportional to 52,087.52, 78,130.70 and 12,644.63 is: 18,966.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,087.52 : 78,130.70 = 12,644.63 : x
  2. Step 2: Convert to fraction form
    52,087.52/78,130.70 = 12,644.63/x
  3. Step 3: Cross multiply
    52,087.52x = 78,130.70 × 12,644.63
  4. Step 4: Simplify right side
    52,087.52x = 987,933,629.43
  5. Step 5: Solve for x
    x = 987,933,629.43/52,087.52
  6. Step 6: Final answer
    x = 18,966.80

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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.