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Finding the Fourth Proportional to 85,899.29, 128,870.87 and 26,735.40

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Solution

The fourth proportional to 85,899.29, 128,870.87 and 26,735.40 is: 40,109.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,899.29 : 128,870.87 = 26,735.40 : x
  2. Step 2: Convert to fraction form
    85,899.29/128,870.87 = 26,735.40/x
  3. Step 3: Cross multiply
    85,899.29x = 128,870.87 × 26,735.40
  4. Step 4: Simplify right side
    85,899.29x = 3,445,414,124.12
  5. Step 5: Solve for x
    x = 3,445,414,124.12/85,899.29
  6. Step 6: Final answer
    x = 40,109.93

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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.