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Finding the Fourth Proportional to 216,572.55, 324,905.18 and 64,781.54

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Solution

The fourth proportional to 216,572.55, 324,905.18 and 64,781.54 is: 97,186.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,572.55 : 324,905.18 = 64,781.54 : x
  2. Step 2: Convert to fraction form
    216,572.55/324,905.18 = 64,781.54/x
  3. Step 3: Cross multiply
    216,572.55x = 324,905.18 × 64,781.54
  4. Step 4: Simplify right side
    216,572.55x = 21,047,855,965.94
  5. Step 5: Solve for x
    x = 21,047,855,965.94/216,572.55
  6. Step 6: Final answer
    x = 97,186.17

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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.