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Finding the Fourth Proportional to 143,938.54, 215,801.16 and 68,987.32

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Solution

The fourth proportional to 143,938.54, 215,801.16 and 68,987.32 is: 103,429.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,938.54 : 215,801.16 = 68,987.32 : x
  2. Step 2: Convert to fraction form
    143,938.54/215,801.16 = 68,987.32/x
  3. Step 3: Cross multiply
    143,938.54x = 215,801.16 × 68,987.32
  4. Step 4: Simplify right side
    143,938.54x = 14,887,543,681.29
  5. Step 5: Solve for x
    x = 14,887,543,681.29/143,938.54
  6. Step 6: Final answer
    x = 103,429.86

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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.