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Finding the Fourth Proportional to 65,246.58, 90,038.79 and 38,383.20

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Solution

The fourth proportional to 65,246.58, 90,038.79 and 38,383.20 is: 52,967.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,246.58 : 90,038.79 = 38,383.20 : x
  2. Step 2: Convert to fraction form
    65,246.58/90,038.79 = 38,383.20/x
  3. Step 3: Cross multiply
    65,246.58x = 90,038.79 × 38,383.20
  4. Step 4: Simplify right side
    65,246.58x = 3,455,976,884.33
  5. Step 5: Solve for x
    x = 3,455,976,884.33/65,246.58
  6. Step 6: Final answer
    x = 52,967.94

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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.