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Finding the Fourth Proportional to 158,718.60, 238,077.90 and 79,986.60

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Solution

The fourth proportional to 158,718.60, 238,077.90 and 79,986.60 is: 119,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,718.60 : 238,077.90 = 79,986.60 : x
  2. Step 2: Convert to fraction form
    158,718.60/238,077.90 = 79,986.60/x
  3. Step 3: Cross multiply
    158,718.60x = 238,077.90 × 79,986.60
  4. Step 4: Simplify right side
    158,718.60x = 19,043,041,756.14
  5. Step 5: Solve for x
    x = 19,043,041,756.14/158,718.60
  6. Step 6: Final answer
    x = 119,979.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.