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Finding the Fourth Proportional to 45,405.62, 68,118.80 and 13,820.16

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Solution

The fourth proportional to 45,405.62, 68,118.80 and 13,820.16 is: 20,733.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,405.62 : 68,118.80 = 13,820.16 : x
  2. Step 2: Convert to fraction form
    45,405.62/68,118.80 = 13,820.16/x
  3. Step 3: Cross multiply
    45,405.62x = 68,118.80 × 13,820.16
  4. Step 4: Simplify right side
    45,405.62x = 941,412,787.51
  5. Step 5: Solve for x
    x = 941,412,787.51/45,405.62
  6. Step 6: Final answer
    x = 20,733.40

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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.