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Finding the Fourth Proportional to 71,751.98, 99,154.28 and 53,815.85

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Solution

The fourth proportional to 71,751.98, 99,154.28 and 53,815.85 is: 74,368.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,751.98 : 99,154.28 = 53,815.85 : x
  2. Step 2: Convert to fraction form
    71,751.98/99,154.28 = 53,815.85/x
  3. Step 3: Cross multiply
    71,751.98x = 99,154.28 × 53,815.85
  4. Step 4: Simplify right side
    71,751.98x = 5,336,071,094.49
  5. Step 5: Solve for x
    x = 5,336,071,094.49/71,751.98
  6. Step 6: Final answer
    x = 74,368.28

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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.