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Finding the Fourth Proportional to 143,547.97, 215,311.57 and 68,648

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Solution

The fourth proportional to 143,547.97, 215,311.57 and 68,648 is: 102,967.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,547.97 : 215,311.57 = 68,648 : x
  2. Step 2: Convert to fraction form
    143,547.97/215,311.57 = 68,648/x
  3. Step 3: Cross multiply
    143,547.97x = 215,311.57 × 68,648
  4. Step 4: Simplify right side
    143,547.97x = 14,780,708,657.36
  5. Step 5: Solve for x
    x = 14,780,708,657.36/143,547.97
  6. Step 6: Final answer
    x = 102,967.03

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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.