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Finding the Fourth Proportional to 154,328.80, 231,320.40 and 87,800.80

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Solution

The fourth proportional to 154,328.80, 231,320.40 and 87,800.80 is: 131,602.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,328.80 : 231,320.40 = 87,800.80 : x
  2. Step 2: Convert to fraction form
    154,328.80/231,320.40 = 87,800.80/x
  3. Step 3: Cross multiply
    154,328.80x = 231,320.40 × 87,800.80
  4. Step 4: Simplify right side
    154,328.80x = 20,310,116,176.32
  5. Step 5: Solve for x
    x = 20,310,116,176.32/154,328.80
  6. Step 6: Final answer
    x = 131,602.89

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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.