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Finding the Fourth Proportional to 133,312.66, 183,969.38 and 72,881.88

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Solution

The fourth proportional to 133,312.66, 183,969.38 and 72,881.88 is: 100,575.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,312.66 : 183,969.38 = 72,881.88 : x
  2. Step 2: Convert to fraction form
    133,312.66/183,969.38 = 72,881.88/x
  3. Step 3: Cross multiply
    133,312.66x = 183,969.38 × 72,881.88
  4. Step 4: Simplify right side
    133,312.66x = 13,408,034,276.83
  5. Step 5: Solve for x
    x = 13,408,034,276.83/133,312.66
  6. Step 6: Final answer
    x = 100,575.85

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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.