Home / 85,749.49-118,560-75,108.61

Finding the Fourth Proportional to 85,749.49, 118,560 and 75,108.61

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Solution

The fourth proportional to 85,749.49, 118,560 and 75,108.61 is: 103,847.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,749.49 : 118,560 = 75,108.61 : x
  2. Step 2: Convert to fraction form
    85,749.49/118,560 = 75,108.61/x
  3. Step 3: Cross multiply
    85,749.49x = 118,560 × 75,108.61
  4. Step 4: Simplify right side
    85,749.49x = 8,904,876,801.60
  5. Step 5: Solve for x
    x = 8,904,876,801.60/85,749.49
  6. Step 6: Final answer
    x = 103,847.58

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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.