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Finding the Fourth Proportional to 156,627.31, 216,047.37 and 92,920

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Solution

The fourth proportional to 156,627.31, 216,047.37 and 92,920 is: 128,171.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,627.31 : 216,047.37 = 92,920 : x
  2. Step 2: Convert to fraction form
    156,627.31/216,047.37 = 92,920/x
  3. Step 3: Cross multiply
    156,627.31x = 216,047.37 × 92,920
  4. Step 4: Simplify right side
    156,627.31x = 20,075,121,620.40
  5. Step 5: Solve for x
    x = 20,075,121,620.40/156,627.31
  6. Step 6: Final answer
    x = 128,171.27

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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.