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Finding the Fourth Proportional to 66,639.39, 91,959.70 and 36,425.77

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Solution

The fourth proportional to 66,639.39, 91,959.70 and 36,425.77 is: 50,266.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,639.39 : 91,959.70 = 36,425.77 : x
  2. Step 2: Convert to fraction form
    66,639.39/91,959.70 = 36,425.77/x
  3. Step 3: Cross multiply
    66,639.39x = 91,959.70 × 36,425.77
  4. Step 4: Simplify right side
    66,639.39x = 3,349,702,881.47
  5. Step 5: Solve for x
    x = 3,349,702,881.47/66,639.39
  6. Step 6: Final answer
    x = 50,266.11

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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.