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Finding the Fourth Proportional to 133,239.98, 183,873.59 and 72,813.17

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Solution

The fourth proportional to 133,239.98, 183,873.59 and 72,813.17 is: 100,483.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,239.98 : 183,873.59 = 72,813.17 : x
  2. Step 2: Convert to fraction form
    133,239.98/183,873.59 = 72,813.17/x
  3. Step 3: Cross multiply
    133,239.98x = 183,873.59 × 72,813.17
  4. Step 4: Simplify right side
    133,239.98x = 13,388,417,683.75
  5. Step 5: Solve for x
    x = 13,388,417,683.75/133,239.98
  6. Step 6: Final answer
    x = 100,483.49

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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.