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Finding the Fourth Proportional to 85,422.80, 128,095.80 and 32,814.80

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Solution

The fourth proportional to 85,422.80, 128,095.80 and 32,814.80 is: 49,207.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,422.80 : 128,095.80 = 32,814.80 : x
  2. Step 2: Convert to fraction form
    85,422.80/128,095.80 = 32,814.80/x
  3. Step 3: Cross multiply
    85,422.80x = 128,095.80 × 32,814.80
  4. Step 4: Simplify right side
    85,422.80x = 4,203,438,057.84
  5. Step 5: Solve for x
    x = 4,203,438,057.84/85,422.80
  6. Step 6: Final answer
    x = 49,207.45

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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.