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Finding the Fourth Proportional to 66,790.60, 92,142.30 and 38,479.48

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Solution

The fourth proportional to 66,790.60, 92,142.30 and 38,479.48 is: 53,085.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,790.60 : 92,142.30 = 38,479.48 : x
  2. Step 2: Convert to fraction form
    66,790.60/92,142.30 = 38,479.48/x
  3. Step 3: Cross multiply
    66,790.60x = 92,142.30 × 38,479.48
  4. Step 4: Simplify right side
    66,790.60x = 3,545,587,790.00
  5. Step 5: Solve for x
    x = 3,545,587,790.00/66,790.60
  6. Step 6: Final answer
    x = 53,085.13

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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.