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Finding the Fourth Proportional to 133,285.68, 183,939.18 and 72,860.42

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Solution

The fourth proportional to 133,285.68, 183,939.18 and 72,860.42 is: 100,550.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,285.68 : 183,939.18 = 72,860.42 : x
  2. Step 2: Convert to fraction form
    133,285.68/183,939.18 = 72,860.42/x
  3. Step 3: Cross multiply
    133,285.68x = 183,939.18 × 72,860.42
  4. Step 4: Simplify right side
    133,285.68x = 13,401,885,909.26
  5. Step 5: Solve for x
    x = 13,401,885,909.26/133,285.68
  6. Step 6: Final answer
    x = 100,550.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.