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Finding the Fourth Proportional to 141,754.78, 212,558.35 and 66,854.81

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Solution

The fourth proportional to 141,754.78, 212,558.35 and 66,854.81 is: 100,247.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,754.78 : 212,558.35 = 66,854.81 : x
  2. Step 2: Convert to fraction form
    141,754.78/212,558.35 = 66,854.81/x
  3. Step 3: Cross multiply
    141,754.78x = 212,558.35 × 66,854.81
  4. Step 4: Simplify right side
    141,754.78x = 14,210,548,880.83
  5. Step 5: Solve for x
    x = 14,210,548,880.83/141,754.78
  6. Step 6: Final answer
    x = 100,247.40

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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.