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Finding the Fourth Proportional to 99,913.63, 137,879.18 and 54,590.65

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Solution

The fourth proportional to 99,913.63, 137,879.18 and 54,590.65 is: 75,334.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,913.63 : 137,879.18 = 54,590.65 : x
  2. Step 2: Convert to fraction form
    99,913.63/137,879.18 = 54,590.65/x
  3. Step 3: Cross multiply
    99,913.63x = 137,879.18 × 54,590.65
  4. Step 4: Simplify right side
    99,913.63x = 7,526,913,095.32
  5. Step 5: Solve for x
    x = 7,526,913,095.32/99,913.63
  6. Step 6: Final answer
    x = 75,334.20

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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.