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Finding the Fourth Proportional to 66,461.49, 91,713.62 and 39,603.40

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Solution

The fourth proportional to 66,461.49, 91,713.62 and 39,603.40 is: 54,650.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.49 : 91,713.62 = 39,603.40 : x
  2. Step 2: Convert to fraction form
    66,461.49/91,713.62 = 39,603.40/x
  3. Step 3: Cross multiply
    66,461.49x = 91,713.62 × 39,603.40
  4. Step 4: Simplify right side
    66,461.49x = 3,632,171,048.03
  5. Step 5: Solve for x
    x = 3,632,171,048.03/66,461.49
  6. Step 6: Final answer
    x = 54,650.76

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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.