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Finding the Fourth Proportional to 140,560.88, 210,503.44 and 80,406.96

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Solution

The fourth proportional to 140,560.88, 210,503.44 and 80,406.96 is: 120,417.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,560.88 : 210,503.44 = 80,406.96 : x
  2. Step 2: Convert to fraction form
    140,560.88/210,503.44 = 80,406.96/x
  3. Step 3: Cross multiply
    140,560.88x = 210,503.44 × 80,406.96
  4. Step 4: Simplify right side
    140,560.88x = 16,925,941,679.94
  5. Step 5: Solve for x
    x = 16,925,941,679.94/140,560.88
  6. Step 6: Final answer
    x = 120,417.16

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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.