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Finding the Fourth Proportional to 103,989.82, 143,528.88 and 67,628.02

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Solution

The fourth proportional to 103,989.82, 143,528.88 and 67,628.02 is: 93,341.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,989.82 : 143,528.88 = 67,628.02 : x
  2. Step 2: Convert to fraction form
    103,989.82/143,528.88 = 67,628.02/x
  3. Step 3: Cross multiply
    103,989.82x = 143,528.88 × 67,628.02
  4. Step 4: Simplify right side
    103,989.82x = 9,706,573,967.22
  5. Step 5: Solve for x
    x = 9,706,573,967.22/103,989.82
  6. Step 6: Final answer
    x = 93,341.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.