Home / 76,415.04-105,321.60-65,761.92

Finding the Fourth Proportional to 76,415.04, 105,321.60 and 65,761.92

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Solution

The fourth proportional to 76,415.04, 105,321.60 and 65,761.92 is: 90,638.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,415.04 : 105,321.60 = 65,761.92 : x
  2. Step 2: Convert to fraction form
    76,415.04/105,321.60 = 65,761.92/x
  3. Step 3: Cross multiply
    76,415.04x = 105,321.60 × 65,761.92
  4. Step 4: Simplify right side
    76,415.04x = 6,926,150,633.47
  5. Step 5: Solve for x
    x = 6,926,150,633.47/76,415.04
  6. Step 6: Final answer
    x = 90,638.58

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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.