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Finding the Fourth Proportional to 65,798.38, 90,719.47 and 54,912.19

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Solution

The fourth proportional to 65,798.38, 90,719.47 and 54,912.19 is: 75,710.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,798.38 : 90,719.47 = 54,912.19 : x
  2. Step 2: Convert to fraction form
    65,798.38/90,719.47 = 54,912.19/x
  3. Step 3: Cross multiply
    65,798.38x = 90,719.47 × 54,912.19
  4. Step 4: Simplify right side
    65,798.38x = 4,981,604,773.34
  5. Step 5: Solve for x
    x = 4,981,604,773.34/65,798.38
  6. Step 6: Final answer
    x = 75,710.14

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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.