Home / 65,687.12-90,615.75-38,816.63

Finding the Fourth Proportional to 65,687.12, 90,615.75 and 38,816.63

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Solution

The fourth proportional to 65,687.12, 90,615.75 and 38,816.63 is: 53,547.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,687.12 : 90,615.75 = 38,816.63 : x
  2. Step 2: Convert to fraction form
    65,687.12/90,615.75 = 38,816.63/x
  3. Step 3: Cross multiply
    65,687.12x = 90,615.75 × 38,816.63
  4. Step 4: Simplify right side
    65,687.12x = 3,517,398,039.92
  5. Step 5: Solve for x
    x = 3,517,398,039.92/65,687.12
  6. Step 6: Final answer
    x = 53,547.76

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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.