Home / 76,530.72-105,648.32-51,079.36

Finding the Fourth Proportional to 76,530.72, 105,648.32 and 51,079.36

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Solution

The fourth proportional to 76,530.72, 105,648.32 and 51,079.36 is: 70,513.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,530.72 : 105,648.32 = 51,079.36 : x
  2. Step 2: Convert to fraction form
    76,530.72/105,648.32 = 51,079.36/x
  3. Step 3: Cross multiply
    76,530.72x = 105,648.32 × 51,079.36
  4. Step 4: Simplify right side
    76,530.72x = 5,396,448,570.68
  5. Step 5: Solve for x
    x = 5,396,448,570.68/76,530.72
  6. Step 6: Final answer
    x = 70,513.50

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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.