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Finding the Fourth Proportional to 66,465.68, 91,719 and 37,781.36

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Solution

The fourth proportional to 66,465.68, 91,719 and 37,781.36 is: 52,136.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,465.68 : 91,719 = 37,781.36 : x
  2. Step 2: Convert to fraction form
    66,465.68/91,719 = 37,781.36/x
  3. Step 3: Cross multiply
    66,465.68x = 91,719 × 37,781.36
  4. Step 4: Simplify right side
    66,465.68x = 3,465,268,557.84
  5. Step 5: Solve for x
    x = 3,465,268,557.84/66,465.68
  6. Step 6: Final answer
    x = 52,136.21

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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.