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Finding the Fourth Proportional to 66,009.60, 98,868.60 and 51,170.40

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Solution

The fourth proportional to 66,009.60, 98,868.60 and 51,170.40 is: 76,642.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,009.60 : 98,868.60 = 51,170.40 : x
  2. Step 2: Convert to fraction form
    66,009.60/98,868.60 = 51,170.40/x
  3. Step 3: Cross multiply
    66,009.60x = 98,868.60 × 51,170.40
  4. Step 4: Simplify right side
    66,009.60x = 5,059,145,809.44
  5. Step 5: Solve for x
    x = 5,059,145,809.44/66,009.60
  6. Step 6: Final answer
    x = 76,642.58

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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.