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Finding the Fourth Proportional to 85,446.93, 128,182.64 and 26,287.57

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Solution

The fourth proportional to 85,446.93, 128,182.64 and 26,287.57 is: 39,435.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,446.93 : 128,182.64 = 26,287.57 : x
  2. Step 2: Convert to fraction form
    85,446.93/128,182.64 = 26,287.57/x
  3. Step 3: Cross multiply
    85,446.93x = 128,182.64 × 26,287.57
  4. Step 4: Simplify right side
    85,446.93x = 3,369,610,121.78
  5. Step 5: Solve for x
    x = 3,369,610,121.78/85,446.93
  6. Step 6: Final answer
    x = 39,435.12

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1.5x scale

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.