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Finding the Fourth Proportional to 141,870.60, 212,805.90 and 71,886.60

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Solution

The fourth proportional to 141,870.60, 212,805.90 and 71,886.60 is: 107,829.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,870.60 : 212,805.90 = 71,886.60 : x
  2. Step 2: Convert to fraction form
    141,870.60/212,805.90 = 71,886.60/x
  3. Step 3: Cross multiply
    141,870.60x = 212,805.90 × 71,886.60
  4. Step 4: Simplify right side
    141,870.60x = 15,297,892,610.94
  5. Step 5: Solve for x
    x = 15,297,892,610.94/141,870.60
  6. Step 6: Final answer
    x = 107,829.90

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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.