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Finding the Fourth Proportional to 65,474.23, 90,364.71 and 38,619.72

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Solution

The fourth proportional to 65,474.23, 90,364.71 and 38,619.72 is: 53,301.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,474.23 : 90,364.71 = 38,619.72 : x
  2. Step 2: Convert to fraction form
    65,474.23/90,364.71 = 38,619.72/x
  3. Step 3: Cross multiply
    65,474.23x = 90,364.71 × 38,619.72
  4. Step 4: Simplify right side
    65,474.23x = 3,489,859,798.08
  5. Step 5: Solve for x
    x = 3,489,859,798.08/65,474.23
  6. Step 6: Final answer
    x = 53,301.27

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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.