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Finding the Fourth Proportional to 65,701.58, 90,668.12 and 35,486.90

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Solution

The fourth proportional to 65,701.58, 90,668.12 and 35,486.90 is: 48,971.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,701.58 : 90,668.12 = 35,486.90 : x
  2. Step 2: Convert to fraction form
    65,701.58/90,668.12 = 35,486.90/x
  3. Step 3: Cross multiply
    65,701.58x = 90,668.12 × 35,486.90
  4. Step 4: Simplify right side
    65,701.58x = 3,217,530,507.63
  5. Step 5: Solve for x
    x = 3,217,530,507.63/65,701.58
  6. Step 6: Final answer
    x = 48,971.89

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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.