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Finding the Fourth Proportional to 131,431.60, 197,017.80 and 64,817.20

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Solution

The fourth proportional to 131,431.60, 197,017.80 and 64,817.20 is: 97,161.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,431.60 : 197,017.80 = 64,817.20 : x
  2. Step 2: Convert to fraction form
    131,431.60/197,017.80 = 64,817.20/x
  3. Step 3: Cross multiply
    131,431.60x = 197,017.80 × 64,817.20
  4. Step 4: Simplify right side
    131,431.60x = 12,770,142,146.16
  5. Step 5: Solve for x
    x = 12,770,142,146.16/131,431.60
  6. Step 6: Final answer
    x = 97,161.89

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1.5x scale

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.