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Finding the Fourth Proportional to 141,806.60, 212,709.90 and 70,947.80

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Solution

The fourth proportional to 141,806.60, 212,709.90 and 70,947.80 is: 106,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,806.60 : 212,709.90 = 70,947.80 : x
  2. Step 2: Convert to fraction form
    141,806.60/212,709.90 = 70,947.80/x
  3. Step 3: Cross multiply
    141,806.60x = 212,709.90 × 70,947.80
  4. Step 4: Simplify right side
    141,806.60x = 15,091,299,443.22
  5. Step 5: Solve for x
    x = 15,091,299,443.22/141,806.60
  6. Step 6: Final answer
    x = 106,421.70

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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.