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Finding the Fourth Proportional to 85,817.91, 128,706.36 and 29,660.01

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Solution

The fourth proportional to 85,817.91, 128,706.36 and 29,660.01 is: 44,482.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,817.91 : 128,706.36 = 29,660.01 : x
  2. Step 2: Convert to fraction form
    85,817.91/128,706.36 = 29,660.01/x
  3. Step 3: Cross multiply
    85,817.91x = 128,706.36 × 29,660.01
  4. Step 4: Simplify right side
    85,817.91x = 3,817,431,924.66
  5. Step 5: Solve for x
    x = 3,817,431,924.66/85,817.91
  6. Step 6: Final answer
    x = 44,482.93

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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.