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Finding the Fourth Proportional to 242,639.60, 363,970.20 and 82,713.20

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Solution

The fourth proportional to 242,639.60, 363,970.20 and 82,713.20 is: 124,073.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,639.60 : 363,970.20 = 82,713.20 : x
  2. Step 2: Convert to fraction form
    242,639.60/363,970.20 = 82,713.20/x
  3. Step 3: Cross multiply
    242,639.60x = 363,970.20 × 82,713.20
  4. Step 4: Simplify right side
    242,639.60x = 30,105,139,946.64
  5. Step 5: Solve for x
    x = 30,105,139,946.64/242,639.60
  6. Step 6: Final answer
    x = 124,073.48

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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.