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Finding the Fourth Proportional to 56,415.20, 84,622.80 and 38,904.80

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Solution

The fourth proportional to 56,415.20, 84,622.80 and 38,904.80 is: 58,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,415.20 : 84,622.80 = 38,904.80 : x
  2. Step 2: Convert to fraction form
    56,415.20/84,622.80 = 38,904.80/x
  3. Step 3: Cross multiply
    56,415.20x = 84,622.80 × 38,904.80
  4. Step 4: Simplify right side
    56,415.20x = 3,292,233,109.44
  5. Step 5: Solve for x
    x = 3,292,233,109.44/56,415.20
  6. Step 6: Final answer
    x = 58,357.20

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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.