Home / 156,979.15-216,625.30-85,356.70

Finding the Fourth Proportional to 156,979.15, 216,625.30 and 85,356.70

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Solution

The fourth proportional to 156,979.15, 216,625.30 and 85,356.70 is: 117,789.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,979.15 : 216,625.30 = 85,356.70 : x
  2. Step 2: Convert to fraction form
    156,979.15/216,625.30 = 85,356.70/x
  3. Step 3: Cross multiply
    156,979.15x = 216,625.30 × 85,356.70
  4. Step 4: Simplify right side
    156,979.15x = 18,490,420,744.51
  5. Step 5: Solve for x
    x = 18,490,420,744.51/156,979.15
  6. Step 6: Final answer
    x = 117,789.02

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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.