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Finding the Fourth Proportional to 65,987.60, 99,054.30 and 51,261.80

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Solution

The fourth proportional to 65,987.60, 99,054.30 and 51,261.80 is: 76,949.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,987.60 : 99,054.30 = 51,261.80 : x
  2. Step 2: Convert to fraction form
    65,987.60/99,054.30 = 51,261.80/x
  3. Step 3: Cross multiply
    65,987.60x = 99,054.30 × 51,261.80
  4. Step 4: Simplify right side
    65,987.60x = 5,077,701,715.74
  5. Step 5: Solve for x
    x = 5,077,701,715.74/65,987.60
  6. Step 6: Final answer
    x = 76,949.33

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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.