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Finding the Fourth Proportional to 85,871.40, 128,834.10 and 41,499.60

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Solution

The fourth proportional to 85,871.40, 128,834.10 and 41,499.60 is: 62,262.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,871.40 : 128,834.10 = 41,499.60 : x
  2. Step 2: Convert to fraction form
    85,871.40/128,834.10 = 41,499.60/x
  3. Step 3: Cross multiply
    85,871.40x = 128,834.10 × 41,499.60
  4. Step 4: Simplify right side
    85,871.40x = 5,346,563,616.36
  5. Step 5: Solve for x
    x = 5,346,563,616.36/85,871.40
  6. Step 6: Final answer
    x = 62,262.45

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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.