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Finding the Fourth Proportional to 65,685.25, 90,645.75 and 37,390.94

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Solution

The fourth proportional to 65,685.25, 90,645.75 and 37,390.94 is: 51,599.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,685.25 : 90,645.75 = 37,390.94 : x
  2. Step 2: Convert to fraction form
    65,685.25/90,645.75 = 37,390.94/x
  3. Step 3: Cross multiply
    65,685.25x = 90,645.75 × 37,390.94
  4. Step 4: Simplify right side
    65,685.25x = 3,389,329,799.51
  5. Step 5: Solve for x
    x = 3,389,329,799.51/65,685.25
  6. Step 6: Final answer
    x = 51,599.56

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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.