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Finding the Fourth Proportional to 210,540.91, 315,817.13 and 70,294.51

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Solution

The fourth proportional to 210,540.91, 315,817.13 and 70,294.51 is: 105,443.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,540.91 : 315,817.13 = 70,294.51 : x
  2. Step 2: Convert to fraction form
    210,540.91/315,817.13 = 70,294.51/x
  3. Step 3: Cross multiply
    210,540.91x = 315,817.13 × 70,294.51
  4. Step 4: Simplify right side
    210,540.91x = 22,200,210,402.96
  5. Step 5: Solve for x
    x = 22,200,210,402.96/210,540.91
  6. Step 6: Final answer
    x = 105,443.69

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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.