Home / 156,338.22-215,746.20-84,720

Finding the Fourth Proportional to 156,338.22, 215,746.20 and 84,720

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Solution

The fourth proportional to 156,338.22, 215,746.20 and 84,720 is: 116,913.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,338.22 : 215,746.20 = 84,720 : x
  2. Step 2: Convert to fraction form
    156,338.22/215,746.20 = 84,720/x
  3. Step 3: Cross multiply
    156,338.22x = 215,746.20 × 84,720
  4. Step 4: Simplify right side
    156,338.22x = 18,278,018,064
  5. Step 5: Solve for x
    x = 18,278,018,064/156,338.22
  6. Step 6: Final answer
    x = 116,913.31

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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.