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Finding the Fourth Proportional to 78,588.31, 117,883.68 and 43,749.40

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Solution

The fourth proportional to 78,588.31, 117,883.68 and 43,749.40 is: 65,624.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,588.31 : 117,883.68 = 43,749.40 : x
  2. Step 2: Convert to fraction form
    78,588.31/117,883.68 = 43,749.40/x
  3. Step 3: Cross multiply
    78,588.31x = 117,883.68 × 43,749.40
  4. Step 4: Simplify right side
    78,588.31x = 5,157,339,680.37
  5. Step 5: Solve for x
    x = 5,157,339,680.37/78,588.31
  6. Step 6: Final answer
    x = 65,624.77

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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.