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Finding the Fourth Proportional to 51,357.60, 76,987.80 and 30,313.80

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Solution

The fourth proportional to 51,357.60, 76,987.80 and 30,313.80 is: 45,442.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,357.60 : 76,987.80 = 30,313.80 : x
  2. Step 2: Convert to fraction form
    51,357.60/76,987.80 = 30,313.80/x
  3. Step 3: Cross multiply
    51,357.60x = 76,987.80 × 30,313.80
  4. Step 4: Simplify right side
    51,357.60x = 2,333,792,771.64
  5. Step 5: Solve for x
    x = 2,333,792,771.64/51,357.60
  6. Step 6: Final answer
    x = 45,442.01

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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.