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Finding the Fourth Proportional to 158,986.40, 238,479.60 and 119,328.80

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Solution

The fourth proportional to 158,986.40, 238,479.60 and 119,328.80 is: 178,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,986.40 : 238,479.60 = 119,328.80 : x
  2. Step 2: Convert to fraction form
    158,986.40/238,479.60 = 119,328.80/x
  3. Step 3: Cross multiply
    158,986.40x = 238,479.60 × 119,328.80
  4. Step 4: Simplify right side
    158,986.40x = 28,457,484,492.48
  5. Step 5: Solve for x
    x = 28,457,484,492.48/158,986.40
  6. Step 6: Final answer
    x = 178,993.20

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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.