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Finding the Fourth Proportional to 42,415.20, 63,622.80 and 29,908.80

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Solution

The fourth proportional to 42,415.20, 63,622.80 and 29,908.80 is: 44,863.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,415.20 : 63,622.80 = 29,908.80 : x
  2. Step 2: Convert to fraction form
    42,415.20/63,622.80 = 29,908.80/x
  3. Step 3: Cross multiply
    42,415.20x = 63,622.80 × 29,908.80
  4. Step 4: Simplify right side
    42,415.20x = 1,902,881,600.64
  5. Step 5: Solve for x
    x = 1,902,881,600.64/42,415.20
  6. Step 6: Final answer
    x = 44,863.20

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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.