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Finding the Fourth Proportional to 92,921.76, 139,480.92 and 57,885.48

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Solution

The fourth proportional to 92,921.76, 139,480.92 and 57,885.48 is: 86,889.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,921.76 : 139,480.92 = 57,885.48 : x
  2. Step 2: Convert to fraction form
    92,921.76/139,480.92 = 57,885.48/x
  3. Step 3: Cross multiply
    92,921.76x = 139,480.92 × 57,885.48
  4. Step 4: Simplify right side
    92,921.76x = 8,073,920,005.04
  5. Step 5: Solve for x
    x = 8,073,920,005.04/92,921.76
  6. Step 6: Final answer
    x = 86,889.44

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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.