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Finding the Fourth Proportional to 210,443.27, 315,681.30 and 70,201.89

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Solution

The fourth proportional to 210,443.27, 315,681.30 and 70,201.89 is: 105,308.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,443.27 : 315,681.30 = 70,201.89 : x
  2. Step 2: Convert to fraction form
    210,443.27/315,681.30 = 70,201.89/x
  3. Step 3: Cross multiply
    210,443.27x = 315,681.30 × 70,201.89
  4. Step 4: Simplify right side
    210,443.27x = 22,161,423,897.66
  5. Step 5: Solve for x
    x = 22,161,423,897.66/210,443.27
  6. Step 6: Final answer
    x = 105,308.31

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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.