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Finding the Fourth Proportional to 66,405.84, 91,638.48 and 36,192.12

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Solution

The fourth proportional to 66,405.84, 91,638.48 and 36,192.12 is: 49,944.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,405.84 : 91,638.48 = 36,192.12 : x
  2. Step 2: Convert to fraction form
    66,405.84/91,638.48 = 36,192.12/x
  3. Step 3: Cross multiply
    66,405.84x = 91,638.48 × 36,192.12
  4. Step 4: Simplify right side
    66,405.84x = 3,316,590,864.78
  5. Step 5: Solve for x
    x = 3,316,590,864.78/66,405.84
  6. Step 6: Final answer
    x = 49,944.26

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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.