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Finding the Fourth Proportional to 210,903.20, 316,354.80 and 68,748.20

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Solution

The fourth proportional to 210,903.20, 316,354.80 and 68,748.20 is: 103,122.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,903.20 : 316,354.80 = 68,748.20 : x
  2. Step 2: Convert to fraction form
    210,903.20/316,354.80 = 68,748.20/x
  3. Step 3: Cross multiply
    210,903.20x = 316,354.80 × 68,748.20
  4. Step 4: Simplify right side
    210,903.20x = 21,748,823,061.36
  5. Step 5: Solve for x
    x = 21,748,823,061.36/210,903.20
  6. Step 6: Final answer
    x = 103,122.30

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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.