Home / 315,111.36-472,524.40-90,420.24

Finding the Fourth Proportional to 315,111.36, 472,524.40 and 90,420.24

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Solution

The fourth proportional to 315,111.36, 472,524.40 and 90,420.24 is: 135,589.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,111.36 : 472,524.40 = 90,420.24 : x
  2. Step 2: Convert to fraction form
    315,111.36/472,524.40 = 90,420.24/x
  3. Step 3: Cross multiply
    315,111.36x = 472,524.40 × 90,420.24
  4. Step 4: Simplify right side
    315,111.36x = 42,725,769,653.86
  5. Step 5: Solve for x
    x = 42,725,769,653.86/315,111.36
  6. Step 6: Final answer
    x = 135,589.43

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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.