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Finding the Fourth Proportional to 156,792.48, 216,375.16 and 85,173.08

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Solution

The fourth proportional to 156,792.48, 216,375.16 and 85,173.08 is: 117,539.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,792.48 : 216,375.16 = 85,173.08 : x
  2. Step 2: Convert to fraction form
    156,792.48/216,375.16 = 85,173.08/x
  3. Step 3: Cross multiply
    156,792.48x = 216,375.16 × 85,173.08
  4. Step 4: Simplify right side
    156,792.48x = 18,429,338,812.69
  5. Step 5: Solve for x
    x = 18,429,338,812.69/156,792.48
  6. Step 6: Final answer
    x = 117,539.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.