Home / 123,990.24-185,837.71-86,346.49

Finding the Fourth Proportional to 123,990.24, 185,837.71 and 86,346.49

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Solution

The fourth proportional to 123,990.24, 185,837.71 and 86,346.49 is: 129,416.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,990.24 : 185,837.71 = 86,346.49 : x
  2. Step 2: Convert to fraction form
    123,990.24/185,837.71 = 86,346.49/x
  3. Step 3: Cross multiply
    123,990.24x = 185,837.71 × 86,346.49
  4. Step 4: Simplify right side
    123,990.24x = 16,046,433,968.14
  5. Step 5: Solve for x
    x = 16,046,433,968.14/123,990.24
  6. Step 6: Final answer
    x = 129,416.91

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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.