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Finding the Fourth Proportional to 158,391.40, 218,584.04 and 86,771.60

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Solution

The fourth proportional to 158,391.40, 218,584.04 and 86,771.60 is: 119,746.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,391.40 : 218,584.04 = 86,771.60 : x
  2. Step 2: Convert to fraction form
    158,391.40/218,584.04 = 86,771.60/x
  3. Step 3: Cross multiply
    158,391.40x = 218,584.04 × 86,771.60
  4. Step 4: Simplify right side
    158,391.40x = 18,966,886,885.26
  5. Step 5: Solve for x
    x = 18,966,886,885.26/158,391.40
  6. Step 6: Final answer
    x = 119,746.95

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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.