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Finding the Fourth Proportional to 133,309.61, 183,967.92 and 72,880.26

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Solution

The fourth proportional to 133,309.61, 183,967.92 and 72,880.26 is: 100,575.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,309.61 : 183,967.92 = 72,880.26 : x
  2. Step 2: Convert to fraction form
    133,309.61/183,967.92 = 72,880.26/x
  3. Step 3: Cross multiply
    133,309.61x = 183,967.92 × 72,880.26
  4. Step 4: Simplify right side
    133,309.61x = 13,407,628,946.40
  5. Step 5: Solve for x
    x = 13,407,628,946.40/133,309.61
  6. Step 6: Final answer
    x = 100,575.11

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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.