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Finding the Fourth Proportional to 85,334.80, 128,030.28 and 40,375.48

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Solution

The fourth proportional to 85,334.80, 128,030.28 and 40,375.48 is: 60,576.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,334.80 : 128,030.28 = 40,375.48 : x
  2. Step 2: Convert to fraction form
    85,334.80/128,030.28 = 40,375.48/x
  3. Step 3: Cross multiply
    85,334.80x = 128,030.28 × 40,375.48
  4. Step 4: Simplify right side
    85,334.80x = 5,169,284,009.53
  5. Step 5: Solve for x
    x = 5,169,284,009.53/85,334.80
  6. Step 6: Final answer
    x = 60,576.51

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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.