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Finding the Fourth Proportional to 143,099.94, 214,710.93 and 71,985.18

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Solution

The fourth proportional to 143,099.94, 214,710.93 and 71,985.18 is: 108,008.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,099.94 : 214,710.93 = 71,985.18 : x
  2. Step 2: Convert to fraction form
    143,099.94/214,710.93 = 71,985.18/x
  3. Step 3: Cross multiply
    143,099.94x = 214,710.93 × 71,985.18
  4. Step 4: Simplify right side
    143,099.94x = 15,456,004,944.02
  5. Step 5: Solve for x
    x = 15,456,004,944.02/143,099.94
  6. Step 6: Final answer
    x = 108,008.47

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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.