Home / 99,985.05-137,979.66-54,663.57

Finding the Fourth Proportional to 99,985.05, 137,979.66 and 54,663.57

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Solution

The fourth proportional to 99,985.05, 137,979.66 and 54,663.57 is: 75,435.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,985.05 : 137,979.66 = 54,663.57 : x
  2. Step 2: Convert to fraction form
    99,985.05/137,979.66 = 54,663.57/x
  3. Step 3: Cross multiply
    99,985.05x = 137,979.66 × 54,663.57
  4. Step 4: Simplify right side
    99,985.05x = 7,542,460,802.99
  5. Step 5: Solve for x
    x = 7,542,460,802.99/99,985.05
  6. Step 6: Final answer
    x = 75,435.89

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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.