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Finding the Fourth Proportional to 143,487, 215,230.50 and 44,991

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Solution

The fourth proportional to 143,487, 215,230.50 and 44,991 is: 67,486.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,487 : 215,230.50 = 44,991 : x
  2. Step 2: Convert to fraction form
    143,487/215,230.50 = 44,991/x
  3. Step 3: Cross multiply
    143,487x = 215,230.50 × 44,991
  4. Step 4: Simplify right side
    143,487x = 9,683,435,425.50
  5. Step 5: Solve for x
    x = 9,683,435,425.50/143,487
  6. Step 6: Final answer
    x = 67,486.50

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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.