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Finding the Fourth Proportional to 65,798.51, 90,719.65 and 54,912.32

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Solution

The fourth proportional to 65,798.51, 90,719.65 and 54,912.32 is: 75,710.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,798.51 : 90,719.65 = 54,912.32 : x
  2. Step 2: Convert to fraction form
    65,798.51/90,719.65 = 54,912.32/x
  3. Step 3: Cross multiply
    65,798.51x = 90,719.65 × 54,912.32
  4. Step 4: Simplify right side
    65,798.51x = 4,981,625,860.21
  5. Step 5: Solve for x
    x = 4,981,625,860.21/65,798.51
  6. Step 6: Final answer
    x = 75,710.32

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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.