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Finding the Fourth Proportional to 65,343.70, 90,194.61 and 51,938.74

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Solution

The fourth proportional to 65,343.70, 90,194.61 and 51,938.74 is: 71,691.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,343.70 : 90,194.61 = 51,938.74 : x
  2. Step 2: Convert to fraction form
    65,343.70/90,194.61 = 51,938.74/x
  3. Step 3: Cross multiply
    65,343.70x = 90,194.61 × 51,938.74
  4. Step 4: Simplify right side
    65,343.70x = 4,684,594,398.19
  5. Step 5: Solve for x
    x = 4,684,594,398.19/65,343.70
  6. Step 6: Final answer
    x = 71,691.60

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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.