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Finding the Fourth Proportional to 210,630.30, 315,946.80 and 84,281.10

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Solution

The fourth proportional to 210,630.30, 315,946.80 and 84,281.10 is: 126,422.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,630.30 : 315,946.80 = 84,281.10 : x
  2. Step 2: Convert to fraction form
    210,630.30/315,946.80 = 84,281.10/x
  3. Step 3: Cross multiply
    210,630.30x = 315,946.80 × 84,281.10
  4. Step 4: Simplify right side
    210,630.30x = 26,628,343,845.48
  5. Step 5: Solve for x
    x = 26,628,343,845.48/210,630.30
  6. Step 6: Final answer
    x = 126,422.19

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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.