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Finding the Fourth Proportional to 141,912.81, 195,838.88 and 78,250.68

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Solution

The fourth proportional to 141,912.81, 195,838.88 and 78,250.68 is: 107,985.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,912.81 : 195,838.88 = 78,250.68 : x
  2. Step 2: Convert to fraction form
    141,912.81/195,838.88 = 78,250.68/x
  3. Step 3: Cross multiply
    141,912.81x = 195,838.88 × 78,250.68
  4. Step 4: Simplify right side
    141,912.81x = 15,324,525,139.19
  5. Step 5: Solve for x
    x = 15,324,525,139.19/141,912.81
  6. Step 6: Final answer
    x = 107,985.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.