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Finding the Fourth Proportional to 156,772.87, 216,347.73 and 85,152.87

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Solution

The fourth proportional to 156,772.87, 216,347.73 and 85,152.87 is: 117,511.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,772.87 : 216,347.73 = 85,152.87 : x
  2. Step 2: Convert to fraction form
    156,772.87/216,347.73 = 85,152.87/x
  3. Step 3: Cross multiply
    156,772.87x = 216,347.73 × 85,152.87
  4. Step 4: Simplify right side
    156,772.87x = 18,422,629,808.16
  5. Step 5: Solve for x
    x = 18,422,629,808.16/156,772.87
  6. Step 6: Final answer
    x = 117,511.60

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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.