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Finding the Fourth Proportional to 85,874.61, 128,799.61 and 41,489.45

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Solution

The fourth proportional to 85,874.61, 128,799.61 and 41,489.45 is: 62,228.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,874.61 : 128,799.61 = 41,489.45 : x
  2. Step 2: Convert to fraction form
    85,874.61/128,799.61 = 41,489.45/x
  3. Step 3: Cross multiply
    85,874.61x = 128,799.61 × 41,489.45
  4. Step 4: Simplify right side
    85,874.61x = 5,343,824,979.11
  5. Step 5: Solve for x
    x = 5,343,824,979.11/85,874.61
  6. Step 6: Final answer
    x = 62,228.23

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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.