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Finding the Fourth Proportional to 133,115.96, 183,700.70 and 72,686.60

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Solution

The fourth proportional to 133,115.96, 183,700.70 and 72,686.60 is: 100,307.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,115.96 : 183,700.70 = 72,686.60 : x
  2. Step 2: Convert to fraction form
    133,115.96/183,700.70 = 72,686.60/x
  3. Step 3: Cross multiply
    133,115.96x = 183,700.70 × 72,686.60
  4. Step 4: Simplify right side
    133,115.96x = 13,352,580,422.31
  5. Step 5: Solve for x
    x = 13,352,580,422.31/133,115.96
  6. Step 6: Final answer
    x = 100,307.88

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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.