Home / 90,619.70-135,985.69-52,686.83

Finding the Fourth Proportional to 90,619.70, 135,985.69 and 52,686.83

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Solution

The fourth proportional to 90,619.70, 135,985.69 and 52,686.83 is: 79,062.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,619.70 : 135,985.69 = 52,686.83 : x
  2. Step 2: Convert to fraction form
    90,619.70/135,985.69 = 52,686.83/x
  3. Step 3: Cross multiply
    90,619.70x = 135,985.69 × 52,686.83
  4. Step 4: Simplify right side
    90,619.70x = 7,164,654,119.82
  5. Step 5: Solve for x
    x = 7,164,654,119.82/90,619.70
  6. Step 6: Final answer
    x = 79,062.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.