Home / 83,531.79-115,162.34-66,361.12

Finding the Fourth Proportional to 83,531.79, 115,162.34 and 66,361.12

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Solution

The fourth proportional to 83,531.79, 115,162.34 and 66,361.12 is: 91,489.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,531.79 : 115,162.34 = 66,361.12 : x
  2. Step 2: Convert to fraction form
    83,531.79/115,162.34 = 66,361.12/x
  3. Step 3: Cross multiply
    83,531.79x = 115,162.34 × 66,361.12
  4. Step 4: Simplify right side
    83,531.79x = 7,642,301,864.22
  5. Step 5: Solve for x
    x = 7,642,301,864.22/83,531.79
  6. Step 6: Final answer
    x = 91,489.74

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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.