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Finding the Fourth Proportional to 83,128.40, 124,692.60 and 49,950.80

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Solution

The fourth proportional to 83,128.40, 124,692.60 and 49,950.80 is: 74,926.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,128.40 : 124,692.60 = 49,950.80 : x
  2. Step 2: Convert to fraction form
    83,128.40/124,692.60 = 49,950.80/x
  3. Step 3: Cross multiply
    83,128.40x = 124,692.60 × 49,950.80
  4. Step 4: Simplify right side
    83,128.40x = 6,228,495,124.08
  5. Step 5: Solve for x
    x = 6,228,495,124.08/83,128.40
  6. Step 6: Final answer
    x = 74,926.20

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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.