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Finding the Fourth Proportional to 45,720.80, 68,696.40 and 29,088.80

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Solution

The fourth proportional to 45,720.80, 68,696.40 and 29,088.80 is: 43,706.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,720.80 : 68,696.40 = 29,088.80 : x
  2. Step 2: Convert to fraction form
    45,720.80/68,696.40 = 29,088.80/x
  3. Step 3: Cross multiply
    45,720.80x = 68,696.40 × 29,088.80
  4. Step 4: Simplify right side
    45,720.80x = 1,998,295,840.32
  5. Step 5: Solve for x
    x = 1,998,295,840.32/45,720.80
  6. Step 6: Final answer
    x = 43,706.49

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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.