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Finding the Fourth Proportional to 45,998.90, 68,998.20 and 12,718.88

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Solution

The fourth proportional to 45,998.90, 68,998.20 and 12,718.88 is: 19,078.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,998.90 : 68,998.20 = 12,718.88 : x
  2. Step 2: Convert to fraction form
    45,998.90/68,998.20 = 12,718.88/x
  3. Step 3: Cross multiply
    45,998.90x = 68,998.20 × 12,718.88
  4. Step 4: Simplify right side
    45,998.90x = 877,579,826.02
  5. Step 5: Solve for x
    x = 877,579,826.02/45,998.90
  6. Step 6: Final answer
    x = 19,078.28

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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.