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Finding the Fourth Proportional to 85,912.65, 118,518.93 and 55,707.75

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Solution

The fourth proportional to 85,912.65, 118,518.93 and 55,707.75 is: 76,850.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,912.65 : 118,518.93 = 55,707.75 : x
  2. Step 2: Convert to fraction form
    85,912.65/118,518.93 = 55,707.75/x
  3. Step 3: Cross multiply
    85,912.65x = 118,518.93 × 55,707.75
  4. Step 4: Simplify right side
    85,912.65x = 6,602,422,922.71
  5. Step 5: Solve for x
    x = 6,602,422,922.71/85,912.65
  6. Step 6: Final answer
    x = 76,850.42

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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.