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Finding the Fourth Proportional to 85,557.96, 128,358.81 and 35,621.46

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Solution

The fourth proportional to 85,557.96, 128,358.81 and 35,621.46 is: 53,441.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,557.96 : 128,358.81 = 35,621.46 : x
  2. Step 2: Convert to fraction form
    85,557.96/128,358.81 = 35,621.46/x
  3. Step 3: Cross multiply
    85,557.96x = 128,358.81 × 35,621.46
  4. Step 4: Simplify right side
    85,557.96x = 4,572,328,216.06
  5. Step 5: Solve for x
    x = 4,572,328,216.06/85,557.96
  6. Step 6: Final answer
    x = 53,441.30

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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.