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Finding the Fourth Proportional to 210,203.73, 315,353.13 and 69,967.89

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Solution

The fourth proportional to 210,203.73, 315,353.13 and 69,967.89 is: 104,967.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,203.73 : 315,353.13 = 69,967.89 : x
  2. Step 2: Convert to fraction form
    210,203.73/315,353.13 = 69,967.89/x
  3. Step 3: Cross multiply
    210,203.73x = 315,353.13 × 69,967.89
  4. Step 4: Simplify right side
    210,203.73x = 22,064,593,111.00
  5. Step 5: Solve for x
    x = 22,064,593,111.00/210,203.73
  6. Step 6: Final answer
    x = 104,967.66

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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.