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Finding the Fourth Proportional to 115,805.45, 159,814.35 and 64,817.75

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Solution

The fourth proportional to 115,805.45, 159,814.35 and 64,817.75 is: 89,450.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,805.45 : 159,814.35 = 64,817.75 : x
  2. Step 2: Convert to fraction form
    115,805.45/159,814.35 = 64,817.75/x
  3. Step 3: Cross multiply
    115,805.45x = 159,814.35 × 64,817.75
  4. Step 4: Simplify right side
    115,805.45x = 10,358,805,785.64
  5. Step 5: Solve for x
    x = 10,358,805,785.64/115,805.45
  6. Step 6: Final answer
    x = 89,450.08

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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.