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Finding the Fourth Proportional to 158,379.35, 218,569.55 and 90,407.39

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Solution

The fourth proportional to 158,379.35, 218,569.55 and 90,407.39 is: 124,765.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,379.35 : 218,569.55 = 90,407.39 : x
  2. Step 2: Convert to fraction form
    158,379.35/218,569.55 = 90,407.39/x
  3. Step 3: Cross multiply
    158,379.35x = 218,569.55 × 90,407.39
  4. Step 4: Simplify right side
    158,379.35x = 19,760,301,004.09
  5. Step 5: Solve for x
    x = 19,760,301,004.09/158,379.35
  6. Step 6: Final answer
    x = 124,765.64

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1.5x scale

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.