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Finding the Fourth Proportional to 141,325.68, 212,019.70 and 78,237.80

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Solution

The fourth proportional to 141,325.68, 212,019.70 and 78,237.80 is: 117,373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,325.68 : 212,019.70 = 78,237.80 : x
  2. Step 2: Convert to fraction form
    141,325.68/212,019.70 = 78,237.80/x
  3. Step 3: Cross multiply
    141,325.68x = 212,019.70 × 78,237.80
  4. Step 4: Simplify right side
    141,325.68x = 16,587,954,884.66
  5. Step 5: Solve for x
    x = 16,587,954,884.66/141,325.68
  6. Step 6: Final answer
    x = 117,373.96

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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.