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Finding the Fourth Proportional to 242,638.60, 363,968.70 and 82,712.20

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Solution

The fourth proportional to 242,638.60, 363,968.70 and 82,712.20 is: 124,071.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,638.60 : 363,968.70 = 82,712.20 : x
  2. Step 2: Convert to fraction form
    242,638.60/363,968.70 = 82,712.20/x
  3. Step 3: Cross multiply
    242,638.60x = 363,968.70 × 82,712.20
  4. Step 4: Simplify right side
    242,638.60x = 30,104,651,908.14
  5. Step 5: Solve for x
    x = 30,104,651,908.14/242,638.60
  6. Step 6: Final answer
    x = 124,071.98

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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.