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Finding the Fourth Proportional to 99,917.36, 137,881.80 and 54,594.32

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Solution

The fourth proportional to 99,917.36, 137,881.80 and 54,594.32 is: 75,337.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,917.36 : 137,881.80 = 54,594.32 : x
  2. Step 2: Convert to fraction form
    99,917.36/137,881.80 = 54,594.32/x
  3. Step 3: Cross multiply
    99,917.36x = 137,881.80 × 54,594.32
  4. Step 4: Simplify right side
    99,917.36x = 7,527,563,111.38
  5. Step 5: Solve for x
    x = 7,527,563,111.38/99,917.36
  6. Step 6: Final answer
    x = 75,337.89

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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.