Home / 122,940.12-169,682.61-77,587.65

Finding the Fourth Proportional to 122,940.12, 169,682.61 and 77,587.65

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Solution

The fourth proportional to 122,940.12, 169,682.61 and 77,587.65 is: 107,086.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,940.12 : 169,682.61 = 77,587.65 : x
  2. Step 2: Convert to fraction form
    122,940.12/169,682.61 = 77,587.65/x
  3. Step 3: Cross multiply
    122,940.12x = 169,682.61 × 77,587.65
  4. Step 4: Simplify right side
    122,940.12x = 13,165,274,955.77
  5. Step 5: Solve for x
    x = 13,165,274,955.77/122,940.12
  6. Step 6: Final answer
    x = 107,086.89

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1.5x scale

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.