Home / 261,185.72-391,816.04-99,139.55

Finding the Fourth Proportional to 261,185.72, 391,816.04 and 99,139.55

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Solution

The fourth proportional to 261,185.72, 391,816.04 and 99,139.55 is: 148,723.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,185.72 : 391,816.04 = 99,139.55 : x
  2. Step 2: Convert to fraction form
    261,185.72/391,816.04 = 99,139.55/x
  3. Step 3: Cross multiply
    261,185.72x = 391,816.04 × 99,139.55
  4. Step 4: Simplify right side
    261,185.72x = 38,844,463,433.60
  5. Step 5: Solve for x
    x = 38,844,463,433.60/261,185.72
  6. Step 6: Final answer
    x = 148,723.54

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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.