Home / 90,320.62-124,358.09-76,681.68

Finding the Fourth Proportional to 90,320.62, 124,358.09 and 76,681.68

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Solution

The fourth proportional to 90,320.62, 124,358.09 and 76,681.68 is: 105,579.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,320.62 : 124,358.09 = 76,681.68 : x
  2. Step 2: Convert to fraction form
    90,320.62/124,358.09 = 76,681.68/x
  3. Step 3: Cross multiply
    90,320.62x = 124,358.09 × 76,681.68
  4. Step 4: Simplify right side
    90,320.62x = 9,535,987,345.73
  5. Step 5: Solve for x
    x = 9,535,987,345.73/90,320.62
  6. Step 6: Final answer
    x = 105,579.30

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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.