Home / 66,630.08-91,946.40-39,790.40

Finding the Fourth Proportional to 66,630.08, 91,946.40 and 39,790.40

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Solution

The fourth proportional to 66,630.08, 91,946.40 and 39,790.40 is: 54,908.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,630.08 : 91,946.40 = 39,790.40 : x
  2. Step 2: Convert to fraction form
    66,630.08/91,946.40 = 39,790.40/x
  3. Step 3: Cross multiply
    66,630.08x = 91,946.40 × 39,790.40
  4. Step 4: Simplify right side
    66,630.08x = 3,658,584,034.56
  5. Step 5: Solve for x
    x = 3,658,584,034.56/66,630.08
  6. Step 6: Final answer
    x = 54,908.89

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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.