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Finding the Fourth Proportional to 74,114.76, 102,438.36 and 65,556.30

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Solution

The fourth proportional to 74,114.76, 102,438.36 and 65,556.30 is: 90,609.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,114.76 : 102,438.36 = 65,556.30 : x
  2. Step 2: Convert to fraction form
    74,114.76/102,438.36 = 65,556.30/x
  3. Step 3: Cross multiply
    74,114.76x = 102,438.36 × 65,556.30
  4. Step 4: Simplify right side
    74,114.76x = 6,715,479,859.67
  5. Step 5: Solve for x
    x = 6,715,479,859.67/74,114.76
  6. Step 6: Final answer
    x = 90,609.21

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1.5x scale

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.