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Finding the Fourth Proportional to 210,502.41, 315,540.86 and 90,637.53

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Solution

The fourth proportional to 210,502.41, 315,540.86 and 90,637.53 is: 135,864.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,502.41 : 315,540.86 = 90,637.53 : x
  2. Step 2: Convert to fraction form
    210,502.41/315,540.86 = 90,637.53/x
  3. Step 3: Cross multiply
    210,502.41x = 315,540.86 × 90,637.53
  4. Step 4: Simplify right side
    210,502.41x = 28,599,843,711.29
  5. Step 5: Solve for x
    x = 28,599,843,711.29/210,502.41
  6. Step 6: Final answer
    x = 135,864.69

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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.