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Finding the Fourth Proportional to 131,482.40, 197,223.60 and 81,618.80

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Solution

The fourth proportional to 131,482.40, 197,223.60 and 81,618.80 is: 122,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,482.40 : 197,223.60 = 81,618.80 : x
  2. Step 2: Convert to fraction form
    131,482.40/197,223.60 = 81,618.80/x
  3. Step 3: Cross multiply
    131,482.40x = 197,223.60 × 81,618.80
  4. Step 4: Simplify right side
    131,482.40x = 16,097,153,563.68
  5. Step 5: Solve for x
    x = 16,097,153,563.68/131,482.40
  6. Step 6: Final answer
    x = 122,428.20

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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.