Home / 76,339.16-105,113.40-66,249.80

Finding the Fourth Proportional to 76,339.16, 105,113.40 and 66,249.80

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Solution

The fourth proportional to 76,339.16, 105,113.40 and 66,249.80 is: 91,221.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,339.16 : 105,113.40 = 66,249.80 : x
  2. Step 2: Convert to fraction form
    76,339.16/105,113.40 = 66,249.80/x
  3. Step 3: Cross multiply
    76,339.16x = 105,113.40 × 66,249.80
  4. Step 4: Simplify right side
    76,339.16x = 6,963,741,727.32
  5. Step 5: Solve for x
    x = 6,963,741,727.32/76,339.16
  6. Step 6: Final answer
    x = 91,221.09

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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.