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Finding the Fourth Proportional to 158,235.54, 218,365.28 and 86,620.09

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Solution

The fourth proportional to 158,235.54, 218,365.28 and 86,620.09 is: 119,535.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,235.54 : 218,365.28 = 86,620.09 : x
  2. Step 2: Convert to fraction form
    158,235.54/218,365.28 = 86,620.09/x
  3. Step 3: Cross multiply
    158,235.54x = 218,365.28 × 86,620.09
  4. Step 4: Simplify right side
    158,235.54x = 18,914,818,681.55
  5. Step 5: Solve for x
    x = 18,914,818,681.55/158,235.54
  6. Step 6: Final answer
    x = 119,535.85

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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.