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Finding the Fourth Proportional to 51,490.40, 77,138.40 and 26,445.20

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Solution

The fourth proportional to 51,490.40, 77,138.40 and 26,445.20 is: 39,617.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,490.40 : 77,138.40 = 26,445.20 : x
  2. Step 2: Convert to fraction form
    51,490.40/77,138.40 = 26,445.20/x
  3. Step 3: Cross multiply
    51,490.40x = 77,138.40 × 26,445.20
  4. Step 4: Simplify right side
    51,490.40x = 2,039,940,415.68
  5. Step 5: Solve for x
    x = 2,039,940,415.68/51,490.40
  6. Step 6: Final answer
    x = 39,617.88

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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.