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Finding the Fourth Proportional to 78,094.99, 107,690.53 and 66,801.87

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Solution

The fourth proportional to 78,094.99, 107,690.53 and 66,801.87 is: 92,117.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,094.99 : 107,690.53 = 66,801.87 : x
  2. Step 2: Convert to fraction form
    78,094.99/107,690.53 = 66,801.87/x
  3. Step 3: Cross multiply
    78,094.99x = 107,690.53 × 66,801.87
  4. Step 4: Simplify right side
    78,094.99x = 7,193,928,785.29
  5. Step 5: Solve for x
    x = 7,193,928,785.29/78,094.99
  6. Step 6: Final answer
    x = 92,117.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.