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Finding the Fourth Proportional to 65,285.57, 90,087.68 and 38,424.42

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Solution

The fourth proportional to 65,285.57, 90,087.68 and 38,424.42 is: 53,021.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,285.57 : 90,087.68 = 38,424.42 : x
  2. Step 2: Convert to fraction form
    65,285.57/90,087.68 = 38,424.42/x
  3. Step 3: Cross multiply
    65,285.57x = 90,087.68 × 38,424.42
  4. Step 4: Simplify right side
    65,285.57x = 3,461,566,949.21
  5. Step 5: Solve for x
    x = 3,461,566,949.21/65,285.57
  6. Step 6: Final answer
    x = 53,021.93

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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.