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Finding the Fourth Proportional to 85,915.08, 128,841.72 and 29,739.96

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Solution

The fourth proportional to 85,915.08, 128,841.72 and 29,739.96 is: 44,599.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,915.08 : 128,841.72 = 29,739.96 : x
  2. Step 2: Convert to fraction form
    85,915.08/128,841.72 = 29,739.96/x
  3. Step 3: Cross multiply
    85,915.08x = 128,841.72 × 29,739.96
  4. Step 4: Simplify right side
    85,915.08x = 3,831,747,599.13
  5. Step 5: Solve for x
    x = 3,831,747,599.13/85,915.08
  6. Step 6: Final answer
    x = 44,599.24

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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.