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Finding the Fourth Proportional to 216,419.04, 324,663.44 and 66,659.28

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Solution

The fourth proportional to 216,419.04, 324,663.44 and 66,659.28 is: 99,999.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,419.04 : 324,663.44 = 66,659.28 : x
  2. Step 2: Convert to fraction form
    216,419.04/324,663.44 = 66,659.28/x
  3. Step 3: Cross multiply
    216,419.04x = 324,663.44 × 66,659.28
  4. Step 4: Simplify right side
    216,419.04x = 21,641,831,152.72
  5. Step 5: Solve for x
    x = 21,641,831,152.72/216,419.04
  6. Step 6: Final answer
    x = 99,999.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.