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Finding the Fourth Proportional to 158,258.88, 218,396.88 and 86,638.88

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Solution

The fourth proportional to 158,258.88, 218,396.88 and 86,638.88 is: 119,561.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,258.88 : 218,396.88 = 86,638.88 : x
  2. Step 2: Convert to fraction form
    158,258.88/218,396.88 = 86,638.88/x
  3. Step 3: Cross multiply
    158,258.88x = 218,396.88 × 86,638.88
  4. Step 4: Simplify right side
    158,258.88x = 18,921,661,078.69
  5. Step 5: Solve for x
    x = 18,921,661,078.69/158,258.88
  6. Step 6: Final answer
    x = 119,561.45

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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.