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Finding the Fourth Proportional to 210,389.63, 315,585.01 and 84,040.18

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Solution

The fourth proportional to 210,389.63, 315,585.01 and 84,040.18 is: 126,060.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,389.63 : 315,585.01 = 84,040.18 : x
  2. Step 2: Convert to fraction form
    210,389.63/315,585.01 = 84,040.18/x
  3. Step 3: Cross multiply
    210,389.63x = 315,585.01 × 84,040.18
  4. Step 4: Simplify right side
    210,389.63x = 26,521,822,136.96
  5. Step 5: Solve for x
    x = 26,521,822,136.96/210,389.63
  6. Step 6: Final answer
    x = 126,060.50

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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.