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Finding the Fourth Proportional to 85,360.80, 128,037.42 and 29,205.84

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Solution

The fourth proportional to 85,360.80, 128,037.42 and 29,205.84 is: 43,807.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,360.80 : 128,037.42 = 29,205.84 : x
  2. Step 2: Convert to fraction form
    85,360.80/128,037.42 = 29,205.84/x
  3. Step 3: Cross multiply
    85,360.80x = 128,037.42 × 29,205.84
  4. Step 4: Simplify right side
    85,360.80x = 3,739,440,402.53
  5. Step 5: Solve for x
    x = 3,739,440,402.53/85,360.80
  6. Step 6: Final answer
    x = 43,807.47

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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.