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Finding the Fourth Proportional to 90,658.98, 125,115.30 and 54,850.50

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Solution

The fourth proportional to 90,658.98, 125,115.30 and 54,850.50 is: 75,697.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,658.98 : 125,115.30 = 54,850.50 : x
  2. Step 2: Convert to fraction form
    90,658.98/125,115.30 = 54,850.50/x
  3. Step 3: Cross multiply
    90,658.98x = 125,115.30 × 54,850.50
  4. Step 4: Simplify right side
    90,658.98x = 6,862,636,762.65
  5. Step 5: Solve for x
    x = 6,862,636,762.65/90,658.98
  6. Step 6: Final answer
    x = 75,697.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.