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Finding the Fourth Proportional to 156,781.30, 235,103.91 and 56,908.30

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Solution

The fourth proportional to 156,781.30, 235,103.91 and 56,908.30 is: 85,337.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,781.30 : 235,103.91 = 56,908.30 : x
  2. Step 2: Convert to fraction form
    156,781.30/235,103.91 = 56,908.30/x
  3. Step 3: Cross multiply
    156,781.30x = 235,103.91 × 56,908.30
  4. Step 4: Simplify right side
    156,781.30x = 13,379,363,841.45
  5. Step 5: Solve for x
    x = 13,379,363,841.45/156,781.30
  6. Step 6: Final answer
    x = 85,337.75

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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.