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Finding the Fourth Proportional to 83,060.40, 124,590.60 and 72,692.40

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Solution

The fourth proportional to 83,060.40, 124,590.60 and 72,692.40 is: 109,038.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,060.40 : 124,590.60 = 72,692.40 : x
  2. Step 2: Convert to fraction form
    83,060.40/124,590.60 = 72,692.40/x
  3. Step 3: Cross multiply
    83,060.40x = 124,590.60 × 72,692.40
  4. Step 4: Simplify right side
    83,060.40x = 9,056,789,731.44
  5. Step 5: Solve for x
    x = 9,056,789,731.44/83,060.40
  6. Step 6: Final answer
    x = 109,038.60

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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.