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Finding the Fourth Proportional to 105,068.80, 157,603.20 and 71,891.20

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Solution

The fourth proportional to 105,068.80, 157,603.20 and 71,891.20 is: 107,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,068.80 : 157,603.20 = 71,891.20 : x
  2. Step 2: Convert to fraction form
    105,068.80/157,603.20 = 71,891.20/x
  3. Step 3: Cross multiply
    105,068.80x = 157,603.20 × 71,891.20
  4. Step 4: Simplify right side
    105,068.80x = 11,330,283,171.84
  5. Step 5: Solve for x
    x = 11,330,283,171.84/105,068.80
  6. Step 6: Final answer
    x = 107,836.80

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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.