Home / 100,666.18-138,919.42-55,344.93

Finding the Fourth Proportional to 100,666.18, 138,919.42 and 55,344.93

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Solution

The fourth proportional to 100,666.18, 138,919.42 and 55,344.93 is: 76,376.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,666.18 : 138,919.42 = 55,344.93 : x
  2. Step 2: Convert to fraction form
    100,666.18/138,919.42 = 55,344.93/x
  3. Step 3: Cross multiply
    100,666.18x = 138,919.42 × 55,344.93
  4. Step 4: Simplify right side
    100,666.18x = 7,688,485,867.06
  5. Step 5: Solve for x
    x = 7,688,485,867.06/100,666.18
  6. Step 6: Final answer
    x = 76,376.06

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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.