Home / 122,489.32-169,077.86-72,185

Finding the Fourth Proportional to 122,489.32, 169,077.86 and 72,185

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Solution

The fourth proportional to 122,489.32, 169,077.86 and 72,185 is: 99,640.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,489.32 : 169,077.86 = 72,185 : x
  2. Step 2: Convert to fraction form
    122,489.32/169,077.86 = 72,185/x
  3. Step 3: Cross multiply
    122,489.32x = 169,077.86 × 72,185
  4. Step 4: Simplify right side
    122,489.32x = 12,204,885,324.10
  5. Step 5: Solve for x
    x = 12,204,885,324.10/122,489.32
  6. Step 6: Final answer
    x = 99,640.40

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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.