Home / 315,090.20-472,705.80-115,406.60

Finding the Fourth Proportional to 315,090.20, 472,705.80 and 115,406.60

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Solution

The fourth proportional to 315,090.20, 472,705.80 and 115,406.60 is: 173,135.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,090.20 : 472,705.80 = 115,406.60 : x
  2. Step 2: Convert to fraction form
    315,090.20/472,705.80 = 115,406.60/x
  3. Step 3: Cross multiply
    315,090.20x = 472,705.80 × 115,406.60
  4. Step 4: Simplify right side
    315,090.20x = 54,553,369,178.28
  5. Step 5: Solve for x
    x = 54,553,369,178.28/315,090.20
  6. Step 6: Final answer
    x = 173,135.72

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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.