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Finding the Fourth Proportional to 71,856.81, 107,840.55 and 57,851.10

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Solution

The fourth proportional to 71,856.81, 107,840.55 and 57,851.10 is: 86,821.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,856.81 : 107,840.55 = 57,851.10 : x
  2. Step 2: Convert to fraction form
    71,856.81/107,840.55 = 57,851.10/x
  3. Step 3: Cross multiply
    71,856.81x = 107,840.55 × 57,851.10
  4. Step 4: Simplify right side
    71,856.81x = 6,238,694,442.11
  5. Step 5: Solve for x
    x = 6,238,694,442.11/71,856.81
  6. Step 6: Final answer
    x = 86,821.20

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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.