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Finding the Fourth Proportional to 85,996.35, 128,952.41 and 35,386.20

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Solution

The fourth proportional to 85,996.35, 128,952.41 and 35,386.20 is: 53,061.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,996.35 : 128,952.41 = 35,386.20 : x
  2. Step 2: Convert to fraction form
    85,996.35/128,952.41 = 35,386.20/x
  3. Step 3: Cross multiply
    85,996.35x = 128,952.41 × 35,386.20
  4. Step 4: Simplify right side
    85,996.35x = 4,563,135,593.81
  5. Step 5: Solve for x
    x = 4,563,135,593.81/85,996.35
  6. Step 6: Final answer
    x = 53,061.97

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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.