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Finding the Fourth Proportional to 210,507.72, 315,810.84 and 143,979.18

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Solution

The fourth proportional to 210,507.72, 315,810.84 and 143,979.18 is: 216,002.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,507.72 : 315,810.84 = 143,979.18 : x
  2. Step 2: Convert to fraction form
    210,507.72/315,810.84 = 143,979.18/x
  3. Step 3: Cross multiply
    210,507.72x = 315,810.84 × 143,979.18
  4. Step 4: Simplify right side
    210,507.72x = 45,470,185,778.31
  5. Step 5: Solve for x
    x = 45,470,185,778.31/210,507.72
  6. Step 6: Final answer
    x = 216,002.46

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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.