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Finding the Fourth Proportional to 65,238.81, 90,028.02 and 38,383.05

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Solution

The fourth proportional to 65,238.81, 90,028.02 and 38,383.05 is: 52,967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,238.81 : 90,028.02 = 38,383.05 : x
  2. Step 2: Convert to fraction form
    65,238.81/90,028.02 = 38,383.05/x
  3. Step 3: Cross multiply
    65,238.81x = 90,028.02 × 38,383.05
  4. Step 4: Simplify right side
    65,238.81x = 3,455,549,993.06
  5. Step 5: Solve for x
    x = 3,455,549,993.06/65,238.81
  6. Step 6: Final answer
    x = 52,967.70

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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.