Home / 100,655.91-138,918.63-64,949.73

Finding the Fourth Proportional to 100,655.91, 138,918.63 and 64,949.73

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Solution

The fourth proportional to 100,655.91, 138,918.63 and 64,949.73 is: 89,639.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,655.91 : 138,918.63 = 64,949.73 : x
  2. Step 2: Convert to fraction form
    100,655.91/138,918.63 = 64,949.73/x
  3. Step 3: Cross multiply
    100,655.91x = 138,918.63 × 64,949.73
  4. Step 4: Simplify right side
    100,655.91x = 9,022,727,510.47
  5. Step 5: Solve for x
    x = 9,022,727,510.47/100,655.91
  6. Step 6: Final answer
    x = 89,639.32

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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.