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Finding the Fourth Proportional to 66,423.84, 91,664.28 and 36,209.12

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Solution

The fourth proportional to 66,423.84, 91,664.28 and 36,209.12 is: 49,968.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,423.84 : 91,664.28 = 36,209.12 : x
  2. Step 2: Convert to fraction form
    66,423.84/91,664.28 = 36,209.12/x
  3. Step 3: Cross multiply
    66,423.84x = 91,664.28 × 36,209.12
  4. Step 4: Simplify right side
    66,423.84x = 3,319,082,914.23
  5. Step 5: Solve for x
    x = 3,319,082,914.23/66,423.84
  6. Step 6: Final answer
    x = 49,968.25

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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.