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Finding the Fourth Proportional to 131,207.70, 196,811.55 and 121,070.10

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Solution

The fourth proportional to 131,207.70, 196,811.55 and 121,070.10 is: 181,605.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,207.70 : 196,811.55 = 121,070.10 : x
  2. Step 2: Convert to fraction form
    131,207.70/196,811.55 = 121,070.10/x
  3. Step 3: Cross multiply
    131,207.70x = 196,811.55 × 121,070.10
  4. Step 4: Simplify right side
    131,207.70x = 23,827,994,039.66
  5. Step 5: Solve for x
    x = 23,827,994,039.66/131,207.70
  6. Step 6: Final answer
    x = 181,605.15

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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.