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Finding the Fourth Proportional to 90,392.70, 124,745.16 and 54,575.76

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Solution

The fourth proportional to 90,392.70, 124,745.16 and 54,575.76 is: 75,316.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,392.70 : 124,745.16 = 54,575.76 : x
  2. Step 2: Convert to fraction form
    90,392.70/124,745.16 = 54,575.76/x
  3. Step 3: Cross multiply
    90,392.70x = 124,745.16 × 54,575.76
  4. Step 4: Simplify right side
    90,392.70x = 6,808,061,913.32
  5. Step 5: Solve for x
    x = 6,808,061,913.32/90,392.70
  6. Step 6: Final answer
    x = 75,316.50

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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.