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Finding the Fourth Proportional to 140,255.80, 210,318.90 and 61,329.40

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Solution

The fourth proportional to 140,255.80, 210,318.90 and 61,329.40 is: 91,965.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,255.80 : 210,318.90 = 61,329.40 : x
  2. Step 2: Convert to fraction form
    140,255.80/210,318.90 = 61,329.40/x
  3. Step 3: Cross multiply
    140,255.80x = 210,318.90 × 61,329.40
  4. Step 4: Simplify right side
    140,255.80x = 12,898,731,945.66
  5. Step 5: Solve for x
    x = 12,898,731,945.66/140,255.80
  6. Step 6: Final answer
    x = 91,965.77

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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.