Home / 76,749.20-105,913.80-43,215.44

Finding the Fourth Proportional to 76,749.20, 105,913.80 and 43,215.44

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Solution

The fourth proportional to 76,749.20, 105,913.80 and 43,215.44 is: 59,637.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,749.20 : 105,913.80 = 43,215.44 : x
  2. Step 2: Convert to fraction form
    76,749.20/105,913.80 = 43,215.44/x
  3. Step 3: Cross multiply
    76,749.20x = 105,913.80 × 43,215.44
  4. Step 4: Simplify right side
    76,749.20x = 4,577,111,469.07
  5. Step 5: Solve for x
    x = 4,577,111,469.07/76,749.20
  6. Step 6: Final answer
    x = 59,637.25

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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.