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Finding the Fourth Proportional to 133,309.01, 183,967.65 and 72,878.55

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Solution

The fourth proportional to 133,309.01, 183,967.65 and 72,878.55 is: 100,573.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,309.01 : 183,967.65 = 72,878.55 : x
  2. Step 2: Convert to fraction form
    133,309.01/183,967.65 = 72,878.55/x
  3. Step 3: Cross multiply
    133,309.01x = 183,967.65 × 72,878.55
  4. Step 4: Simplify right side
    133,309.01x = 13,407,295,578.91
  5. Step 5: Solve for x
    x = 13,407,295,578.91/133,309.01
  6. Step 6: Final answer
    x = 100,573.07

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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.