Home / 261,089.28-390,786.60-140,979.24

Finding the Fourth Proportional to 261,089.28, 390,786.60 and 140,979.24

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Solution

The fourth proportional to 261,089.28, 390,786.60 and 140,979.24 is: 211,011.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,089.28 : 390,786.60 = 140,979.24 : x
  2. Step 2: Convert to fraction form
    261,089.28/390,786.60 = 140,979.24/x
  3. Step 3: Cross multiply
    261,089.28x = 390,786.60 × 140,979.24
  4. Step 4: Simplify right side
    261,089.28x = 55,092,797,870.18
  5. Step 5: Solve for x
    x = 55,092,797,870.18/261,089.28
  6. Step 6: Final answer
    x = 211,011.34

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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.