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Finding the Fourth Proportional to 51,128.60, 76,692.90 and 48,898.20

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Solution

The fourth proportional to 51,128.60, 76,692.90 and 48,898.20 is: 73,347.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,128.60 : 76,692.90 = 48,898.20 : x
  2. Step 2: Convert to fraction form
    51,128.60/76,692.90 = 48,898.20/x
  3. Step 3: Cross multiply
    51,128.60x = 76,692.90 × 48,898.20
  4. Step 4: Simplify right side
    51,128.60x = 3,750,144,762.78
  5. Step 5: Solve for x
    x = 3,750,144,762.78/51,128.60
  6. Step 6: Final answer
    x = 73,347.30

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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.