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Finding the Fourth Proportional to 127,809.20, 191,746.92 and 61,300.64

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Solution

The fourth proportional to 127,809.20, 191,746.92 and 61,300.64 is: 91,966.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,809.20 : 191,746.92 = 61,300.64 : x
  2. Step 2: Convert to fraction form
    127,809.20/191,746.92 = 61,300.64/x
  3. Step 3: Cross multiply
    127,809.20x = 191,746.92 × 61,300.64
  4. Step 4: Simplify right side
    127,809.20x = 11,754,208,914.03
  5. Step 5: Solve for x
    x = 11,754,208,914.03/127,809.20
  6. Step 6: Final answer
    x = 91,966.85

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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.