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Finding the Fourth Proportional to 76,999.68, 106,160.76 and 63,151.20

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Solution

The fourth proportional to 76,999.68, 106,160.76 and 63,151.20 is: 87,067.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,999.68 : 106,160.76 = 63,151.20 : x
  2. Step 2: Convert to fraction form
    76,999.68/106,160.76 = 63,151.20/x
  3. Step 3: Cross multiply
    76,999.68x = 106,160.76 × 63,151.20
  4. Step 4: Simplify right side
    76,999.68x = 6,704,179,386.91
  5. Step 5: Solve for x
    x = 6,704,179,386.91/76,999.68
  6. Step 6: Final answer
    x = 87,067.63

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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.