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Finding the Fourth Proportional to 90,212.52, 124,493.94 and 54,395.40

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Solution

The fourth proportional to 90,212.52, 124,493.94 and 54,395.40 is: 75,066.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,212.52 : 124,493.94 = 54,395.40 : x
  2. Step 2: Convert to fraction form
    90,212.52/124,493.94 = 54,395.40/x
  3. Step 3: Cross multiply
    90,212.52x = 124,493.94 × 54,395.40
  4. Step 4: Simplify right side
    90,212.52x = 6,771,897,663.88
  5. Step 5: Solve for x
    x = 6,771,897,663.88/90,212.52
  6. Step 6: Final answer
    x = 75,066.05

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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.