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Finding the Fourth Proportional to 99,368.52, 137,121.50 and 54,045.58

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Solution

The fourth proportional to 99,368.52, 137,121.50 and 54,045.58 is: 74,579.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,368.52 : 137,121.50 = 54,045.58 : x
  2. Step 2: Convert to fraction form
    99,368.52/137,121.50 = 54,045.58/x
  3. Step 3: Cross multiply
    99,368.52x = 137,121.50 × 54,045.58
  4. Step 4: Simplify right side
    99,368.52x = 7,410,810,042.13
  5. Step 5: Solve for x
    x = 7,410,810,042.13/99,368.52
  6. Step 6: Final answer
    x = 74,579.05

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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.