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Finding the Fourth Proportional to 133,298.56, 183,951.56 and 72,869.20

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Solution

The fourth proportional to 133,298.56, 183,951.56 and 72,869.20 is: 100,559.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,298.56 : 183,951.56 = 72,869.20 : x
  2. Step 2: Convert to fraction form
    133,298.56/183,951.56 = 72,869.20/x
  3. Step 3: Cross multiply
    133,298.56x = 183,951.56 × 72,869.20
  4. Step 4: Simplify right side
    133,298.56x = 13,404,403,015.95
  5. Step 5: Solve for x
    x = 13,404,403,015.95/133,298.56
  6. Step 6: Final answer
    x = 100,559.25

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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.