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Finding the Fourth Proportional to 73,688.60, 110,428.26 and 56,757.60

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Solution

The fourth proportional to 73,688.60, 110,428.26 and 56,757.60 is: 85,055.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,688.60 : 110,428.26 = 56,757.60 : x
  2. Step 2: Convert to fraction form
    73,688.60/110,428.26 = 56,757.60/x
  3. Step 3: Cross multiply
    73,688.60x = 110,428.26 × 56,757.60
  4. Step 4: Simplify right side
    73,688.60x = 6,267,643,009.78
  5. Step 5: Solve for x
    x = 6,267,643,009.78/73,688.60
  6. Step 6: Final answer
    x = 85,055.80

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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.