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Finding the Fourth Proportional to 141,639.60, 212,232.60 and 74,992.80

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Solution

The fourth proportional to 141,639.60, 212,232.60 and 74,992.80 is: 112,369.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,639.60 : 212,232.60 = 74,992.80 : x
  2. Step 2: Convert to fraction form
    141,639.60/212,232.60 = 74,992.80/x
  3. Step 3: Cross multiply
    141,639.60x = 212,232.60 × 74,992.80
  4. Step 4: Simplify right side
    141,639.60x = 15,915,916,925.28
  5. Step 5: Solve for x
    x = 15,915,916,925.28/141,639.60
  6. Step 6: Final answer
    x = 112,369.12

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1.5x scale

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.