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Finding the Fourth Proportional to 45,642.80, 68,434.60 and 19,340.40

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Solution

The fourth proportional to 45,642.80, 68,434.60 and 19,340.40 is: 28,998.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,642.80 : 68,434.60 = 19,340.40 : x
  2. Step 2: Convert to fraction form
    45,642.80/68,434.60 = 19,340.40/x
  3. Step 3: Cross multiply
    45,642.80x = 68,434.60 × 19,340.40
  4. Step 4: Simplify right side
    45,642.80x = 1,323,552,537.84
  5. Step 5: Solve for x
    x = 1,323,552,537.84/45,642.80
  6. Step 6: Final answer
    x = 28,998.06

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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.