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Finding the Fourth Proportional to 90,682.88, 124,836 and 74,742.08

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Solution

The fourth proportional to 90,682.88, 124,836 and 74,742.08 is: 102,891.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,682.88 : 124,836 = 74,742.08 : x
  2. Step 2: Convert to fraction form
    90,682.88/124,836 = 74,742.08/x
  3. Step 3: Cross multiply
    90,682.88x = 124,836 × 74,742.08
  4. Step 4: Simplify right side
    90,682.88x = 9,330,502,298.88
  5. Step 5: Solve for x
    x = 9,330,502,298.88/90,682.88
  6. Step 6: Final answer
    x = 102,891.55

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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.