Home / 158,345.09-218,519.76-90,360.71

Finding the Fourth Proportional to 158,345.09, 218,519.76 and 90,360.71

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Solution

The fourth proportional to 158,345.09, 218,519.76 and 90,360.71 is: 124,699.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,345.09 : 218,519.76 = 90,360.71 : x
  2. Step 2: Convert to fraction form
    158,345.09/218,519.76 = 90,360.71/x
  3. Step 3: Cross multiply
    158,345.09x = 218,519.76 × 90,360.71
  4. Step 4: Simplify right side
    158,345.09x = 19,745,600,728.33
  5. Step 5: Solve for x
    x = 19,745,600,728.33/158,345.09
  6. Step 6: Final answer
    x = 124,699.80

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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.