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Finding the Fourth Proportional to 141,812.79, 212,758.65 and 61,857.75

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Solution

The fourth proportional to 141,812.79, 212,758.65 and 61,857.75 is: 92,803.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,812.79 : 212,758.65 = 61,857.75 : x
  2. Step 2: Convert to fraction form
    141,812.79/212,758.65 = 61,857.75/x
  3. Step 3: Cross multiply
    141,812.79x = 212,758.65 × 61,857.75
  4. Step 4: Simplify right side
    141,812.79x = 13,160,771,382.04
  5. Step 5: Solve for x
    x = 13,160,771,382.04/141,812.79
  6. Step 6: Final answer
    x = 92,803.84

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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.