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Finding the Fourth Proportional to 77,056.60, 115,601.10 and 43,749.40

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Solution

The fourth proportional to 77,056.60, 115,601.10 and 43,749.40 is: 65,633.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,056.60 : 115,601.10 = 43,749.40 : x
  2. Step 2: Convert to fraction form
    77,056.60/115,601.10 = 43,749.40/x
  3. Step 3: Cross multiply
    77,056.60x = 115,601.10 × 43,749.40
  4. Step 4: Simplify right side
    77,056.60x = 5,057,478,764.34
  5. Step 5: Solve for x
    x = 5,057,478,764.34/77,056.60
  6. Step 6: Final answer
    x = 65,633.30

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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.