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Finding the Fourth Proportional to 315,135.06, 472,630.59 and 90,493.71

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Solution

The fourth proportional to 315,135.06, 472,630.59 and 90,493.71 is: 135,719.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,135.06 : 472,630.59 = 90,493.71 : x
  2. Step 2: Convert to fraction form
    315,135.06/472,630.59 = 90,493.71/x
  3. Step 3: Cross multiply
    315,135.06x = 472,630.59 × 90,493.71
  4. Step 4: Simplify right side
    315,135.06x = 42,770,095,548.59
  5. Step 5: Solve for x
    x = 42,770,095,548.59/315,135.06
  6. Step 6: Final answer
    x = 135,719.89

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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.