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Finding the Fourth Proportional to 108,762.16, 149,932.92 and 76,874.80

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Solution

The fourth proportional to 108,762.16, 149,932.92 and 76,874.80 is: 105,974.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,762.16 : 149,932.92 = 76,874.80 : x
  2. Step 2: Convert to fraction form
    108,762.16/149,932.92 = 76,874.80/x
  3. Step 3: Cross multiply
    108,762.16x = 149,932.92 × 76,874.80
  4. Step 4: Simplify right side
    108,762.16x = 11,526,063,238.42
  5. Step 5: Solve for x
    x = 11,526,063,238.42/108,762.16
  6. Step 6: Final answer
    x = 105,974.94

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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.