Home / 100,694.40-138,955.20-55,372.16

Finding the Fourth Proportional to 100,694.40, 138,955.20 and 55,372.16

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Solution

The fourth proportional to 100,694.40, 138,955.20 and 55,372.16 is: 76,411.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,694.40 : 138,955.20 = 55,372.16 : x
  2. Step 2: Convert to fraction form
    100,694.40/138,955.20 = 55,372.16/x
  3. Step 3: Cross multiply
    100,694.40x = 138,955.20 × 55,372.16
  4. Step 4: Simplify right side
    100,694.40x = 7,694,249,567.23
  5. Step 5: Solve for x
    x = 7,694,249,567.23/100,694.40
  6. Step 6: Final answer
    x = 76,411.89

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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.