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Finding the Fourth Proportional to 158,124.78, 218,217.36 and 86,504.81

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Solution

The fourth proportional to 158,124.78, 218,217.36 and 86,504.81 is: 119,379.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,124.78 : 218,217.36 = 86,504.81 : x
  2. Step 2: Convert to fraction form
    158,124.78/218,217.36 = 86,504.81/x
  3. Step 3: Cross multiply
    158,124.78x = 218,217.36 × 86,504.81
  4. Step 4: Simplify right side
    158,124.78x = 18,876,851,265.50
  5. Step 5: Solve for x
    x = 18,876,851,265.50/158,124.78
  6. Step 6: Final answer
    x = 119,379.46

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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.