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Finding the Fourth Proportional to 131,409.80, 197,114.70 and 64,860.20

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Solution

The fourth proportional to 131,409.80, 197,114.70 and 64,860.20 is: 97,290.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,409.80 : 197,114.70 = 64,860.20 : x
  2. Step 2: Convert to fraction form
    131,409.80/197,114.70 = 64,860.20/x
  3. Step 3: Cross multiply
    131,409.80x = 197,114.70 × 64,860.20
  4. Step 4: Simplify right side
    131,409.80x = 12,784,898,864.94
  5. Step 5: Solve for x
    x = 12,784,898,864.94/131,409.80
  6. Step 6: Final answer
    x = 97,290.30

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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.