Home / 100,506.47-138,700.66-55,186.37

Finding the Fourth Proportional to 100,506.47, 138,700.66 and 55,186.37

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Solution

The fourth proportional to 100,506.47, 138,700.66 and 55,186.37 is: 76,158.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,506.47 : 138,700.66 = 55,186.37 : x
  2. Step 2: Convert to fraction form
    100,506.47/138,700.66 = 55,186.37/x
  3. Step 3: Cross multiply
    100,506.47x = 138,700.66 × 55,186.37
  4. Step 4: Simplify right side
    100,506.47x = 7,654,385,248.50
  5. Step 5: Solve for x
    x = 7,654,385,248.50/100,506.47
  6. Step 6: Final answer
    x = 76,158.13

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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.