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Finding the Fourth Proportional to 75,999.60, 113,999.40 and 51,116.40

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Solution

The fourth proportional to 75,999.60, 113,999.40 and 51,116.40 is: 76,674.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,999.60 : 113,999.40 = 51,116.40 : x
  2. Step 2: Convert to fraction form
    75,999.60/113,999.40 = 51,116.40/x
  3. Step 3: Cross multiply
    75,999.60x = 113,999.40 × 51,116.40
  4. Step 4: Simplify right side
    75,999.60x = 5,827,238,930.16
  5. Step 5: Solve for x
    x = 5,827,238,930.16/75,999.60
  6. Step 6: Final answer
    x = 76,674.60

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1.5x scale

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.