Home / 99,349.72-137,463.64-86,629.43

Finding the Fourth Proportional to 99,349.72, 137,463.64 and 86,629.43

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Solution

The fourth proportional to 99,349.72, 137,463.64 and 86,629.43 is: 119,863.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,349.72 : 137,463.64 = 86,629.43 : x
  2. Step 2: Convert to fraction form
    99,349.72/137,463.64 = 86,629.43/x
  3. Step 3: Cross multiply
    99,349.72x = 137,463.64 × 86,629.43
  4. Step 4: Simplify right side
    99,349.72x = 11,908,395,875.03
  5. Step 5: Solve for x
    x = 11,908,395,875.03/99,349.72
  6. Step 6: Final answer
    x = 119,863.41

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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.