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Finding the Fourth Proportional to 85,753.62, 128,609.64 and 35,806.59

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Solution

The fourth proportional to 85,753.62, 128,609.64 and 35,806.59 is: 53,701.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,753.62 : 128,609.64 = 35,806.59 : x
  2. Step 2: Convert to fraction form
    85,753.62/128,609.64 = 35,806.59/x
  3. Step 3: Cross multiply
    85,753.62x = 128,609.64 × 35,806.59
  4. Step 4: Simplify right side
    85,753.62x = 4,605,072,649.53
  5. Step 5: Solve for x
    x = 4,605,072,649.53/85,753.62
  6. Step 6: Final answer
    x = 53,701.20

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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.