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Finding the Fourth Proportional to 85,425.91, 128,149.12 and 35,539.76

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Solution

The fourth proportional to 85,425.91, 128,149.12 and 35,539.76 is: 53,313.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,425.91 : 128,149.12 = 35,539.76 : x
  2. Step 2: Convert to fraction form
    85,425.91/128,149.12 = 35,539.76/x
  3. Step 3: Cross multiply
    85,425.91x = 128,149.12 × 35,539.76
  4. Step 4: Simplify right side
    85,425.91x = 4,554,389,333.81
  5. Step 5: Solve for x
    x = 4,554,389,333.81/85,425.91
  6. Step 6: Final answer
    x = 53,313.91

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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.