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Finding the Fourth Proportional to 268,655.40, 402,885.90 and 108,664.20

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Solution

The fourth proportional to 268,655.40, 402,885.90 and 108,664.20 is: 162,956.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,655.40 : 402,885.90 = 108,664.20 : x
  2. Step 2: Convert to fraction form
    268,655.40/402,885.90 = 108,664.20/x
  3. Step 3: Cross multiply
    268,655.40x = 402,885.90 × 108,664.20
  4. Step 4: Simplify right side
    268,655.40x = 43,779,274,014.78
  5. Step 5: Solve for x
    x = 43,779,274,014.78/268,655.40
  6. Step 6: Final answer
    x = 162,956.99

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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.