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Finding the Fourth Proportional to 127,809.60, 191,787.30 and 48,980.40

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Solution

The fourth proportional to 127,809.60, 191,787.30 and 48,980.40 is: 73,498.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,809.60 : 191,787.30 = 48,980.40 : x
  2. Step 2: Convert to fraction form
    127,809.60/191,787.30 = 48,980.40/x
  3. Step 3: Cross multiply
    127,809.60x = 191,787.30 × 48,980.40
  4. Step 4: Simplify right side
    127,809.60x = 9,393,818,668.92
  5. Step 5: Solve for x
    x = 9,393,818,668.92/127,809.60
  6. Step 6: Final answer
    x = 73,498.54

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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.