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Finding the Fourth Proportional to 85,758.86, 128,632.08 and 28,833.14

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Solution

The fourth proportional to 85,758.86, 128,632.08 and 28,833.14 is: 43,247.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,758.86 : 128,632.08 = 28,833.14 : x
  2. Step 2: Convert to fraction form
    85,758.86/128,632.08 = 28,833.14/x
  3. Step 3: Cross multiply
    85,758.86x = 128,632.08 × 28,833.14
  4. Step 4: Simplify right side
    85,758.86x = 3,708,866,771.13
  5. Step 5: Solve for x
    x = 3,708,866,771.13/85,758.86
  6. Step 6: Final answer
    x = 43,247.62

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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.