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Finding the Fourth Proportional to 75,490.90, 113,235.94 and 19,330.90

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Solution

The fourth proportional to 75,490.90, 113,235.94 and 19,330.90 is: 28,996.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,490.90 : 113,235.94 = 19,330.90 : x
  2. Step 2: Convert to fraction form
    75,490.90/113,235.94 = 19,330.90/x
  3. Step 3: Cross multiply
    75,490.90x = 113,235.94 × 19,330.90
  4. Step 4: Simplify right side
    75,490.90x = 2,188,952,632.55
  5. Step 5: Solve for x
    x = 2,188,952,632.55/75,490.90
  6. Step 6: Final answer
    x = 28,996.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.