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Finding the Fourth Proportional to 141,814.80, 212,441.40 and 91,929.60

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Solution

The fourth proportional to 141,814.80, 212,441.40 and 91,929.60 is: 137,712.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,814.80 : 212,441.40 = 91,929.60 : x
  2. Step 2: Convert to fraction form
    141,814.80/212,441.40 = 91,929.60/x
  3. Step 3: Cross multiply
    141,814.80x = 212,441.40 × 91,929.60
  4. Step 4: Simplify right side
    141,814.80x = 19,529,652,925.44
  5. Step 5: Solve for x
    x = 19,529,652,925.44/141,814.80
  6. Step 6: Final answer
    x = 137,712.38

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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.