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Finding the Fourth Proportional to 85,361.80, 128,038.92 and 29,206.84

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Solution

The fourth proportional to 85,361.80, 128,038.92 and 29,206.84 is: 43,808.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,361.80 : 128,038.92 = 29,206.84 : x
  2. Step 2: Convert to fraction form
    85,361.80/128,038.92 = 29,206.84/x
  3. Step 3: Cross multiply
    85,361.80x = 128,038.92 × 29,206.84
  4. Step 4: Simplify right side
    85,361.80x = 3,739,612,250.21
  5. Step 5: Solve for x
    x = 3,739,612,250.21/85,361.80
  6. Step 6: Final answer
    x = 43,808.97

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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.