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Finding the Fourth Proportional to 99,351.96, 137,036.21 and 65,349.58

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Solution

The fourth proportional to 99,351.96, 137,036.21 and 65,349.58 is: 90,136.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,351.96 : 137,036.21 = 65,349.58 : x
  2. Step 2: Convert to fraction form
    99,351.96/137,036.21 = 65,349.58/x
  3. Step 3: Cross multiply
    99,351.96x = 137,036.21 × 65,349.58
  4. Step 4: Simplify right side
    99,351.96x = 8,955,258,768.29
  5. Step 5: Solve for x
    x = 8,955,258,768.29/99,351.96
  6. Step 6: Final answer
    x = 90,136.71

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1.5x scale

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.