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Finding the Fourth Proportional to 315,134.88, 472,630.32 and 90,493.53

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Solution

The fourth proportional to 315,134.88, 472,630.32 and 90,493.53 is: 135,719.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,134.88 : 472,630.32 = 90,493.53 : x
  2. Step 2: Convert to fraction form
    315,134.88/472,630.32 = 90,493.53/x
  3. Step 3: Cross multiply
    315,134.88x = 472,630.32 × 90,493.53
  4. Step 4: Simplify right side
    315,134.88x = 42,769,986,041.83
  5. Step 5: Solve for x
    x = 42,769,986,041.83/315,134.88
  6. Step 6: Final answer
    x = 135,719.62

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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.