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Finding the Fourth Proportional to 66,279.36, 91,455.84 and 37,980.48

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Solution

The fourth proportional to 66,279.36, 91,455.84 and 37,980.48 is: 52,407.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,279.36 : 91,455.84 = 37,980.48 : x
  2. Step 2: Convert to fraction form
    66,279.36/91,455.84 = 37,980.48/x
  3. Step 3: Cross multiply
    66,279.36x = 91,455.84 × 37,980.48
  4. Step 4: Simplify right side
    66,279.36x = 3,473,536,702.00
  5. Step 5: Solve for x
    x = 3,473,536,702.00/66,279.36
  6. Step 6: Final answer
    x = 52,407.52

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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.