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Finding the Fourth Proportional to 239,655.90, 359,483.84 and 81,885.72

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Solution

The fourth proportional to 239,655.90, 359,483.84 and 81,885.72 is: 122,828.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,655.90 : 359,483.84 = 81,885.72 : x
  2. Step 2: Convert to fraction form
    239,655.90/359,483.84 = 81,885.72/x
  3. Step 3: Cross multiply
    239,655.90x = 359,483.84 × 81,885.72
  4. Step 4: Simplify right side
    239,655.90x = 29,436,593,066.76
  5. Step 5: Solve for x
    x = 29,436,593,066.76/239,655.90
  6. Step 6: Final answer
    x = 122,828.58

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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.