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Finding the Fourth Proportional to 82,866.60, 124,317.90 and 30,276

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Solution

The fourth proportional to 82,866.60, 124,317.90 and 30,276 is: 45,420.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,866.60 : 124,317.90 = 30,276 : x
  2. Step 2: Convert to fraction form
    82,866.60/124,317.90 = 30,276/x
  3. Step 3: Cross multiply
    82,866.60x = 124,317.90 × 30,276
  4. Step 4: Simplify right side
    82,866.60x = 3,763,848,740.40
  5. Step 5: Solve for x
    x = 3,763,848,740.40/82,866.60
  6. Step 6: Final answer
    x = 45,420.58

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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.