Home / 76,764.58-105,979.08-51,314.06

Finding the Fourth Proportional to 76,764.58, 105,979.08 and 51,314.06

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Solution

The fourth proportional to 76,764.58, 105,979.08 and 51,314.06 is: 70,842.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,764.58 : 105,979.08 = 51,314.06 : x
  2. Step 2: Convert to fraction form
    76,764.58/105,979.08 = 51,314.06/x
  3. Step 3: Cross multiply
    76,764.58x = 105,979.08 × 51,314.06
  4. Step 4: Simplify right side
    76,764.58x = 5,438,216,869.86
  5. Step 5: Solve for x
    x = 5,438,216,869.86/76,764.58
  6. Step 6: Final answer
    x = 70,842.79

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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.