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Finding the Fourth Proportional to 140,953.96, 211,363.98 and 81,807.76

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Solution

The fourth proportional to 140,953.96, 211,363.98 and 81,807.76 is: 122,672.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,953.96 : 211,363.98 = 81,807.76 : x
  2. Step 2: Convert to fraction form
    140,953.96/211,363.98 = 81,807.76/x
  3. Step 3: Cross multiply
    140,953.96x = 211,363.98 × 81,807.76
  4. Step 4: Simplify right side
    140,953.96x = 17,291,213,748.48
  5. Step 5: Solve for x
    x = 17,291,213,748.48/140,953.96
  6. Step 6: Final answer
    x = 122,672.78

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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.