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Finding the Fourth Proportional to 143,866.40, 215,864.40 and 68,957.60

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Solution

The fourth proportional to 143,866.40, 215,864.40 and 68,957.60 is: 103,467.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,866.40 : 215,864.40 = 68,957.60 : x
  2. Step 2: Convert to fraction form
    143,866.40/215,864.40 = 68,957.60/x
  3. Step 3: Cross multiply
    143,866.40x = 215,864.40 × 68,957.60
  4. Step 4: Simplify right side
    143,866.40x = 14,885,490,949.44
  5. Step 5: Solve for x
    x = 14,885,490,949.44/143,866.40
  6. Step 6: Final answer
    x = 103,467.46

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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.