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Finding the Fourth Proportional to 85,808.43, 128,713.40 and 35,235.27

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Solution

The fourth proportional to 85,808.43, 128,713.40 and 35,235.27 is: 52,853.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,808.43 : 128,713.40 = 35,235.27 : x
  2. Step 2: Convert to fraction form
    85,808.43/128,713.40 = 35,235.27/x
  3. Step 3: Cross multiply
    85,808.43x = 128,713.40 × 35,235.27
  4. Step 4: Simplify right side
    85,808.43x = 4,535,251,555.77
  5. Step 5: Solve for x
    x = 4,535,251,555.77/85,808.43
  6. Step 6: Final answer
    x = 52,853.22

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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.