Home / 142,195.80-196,220.28-78,528.60

Finding the Fourth Proportional to 142,195.80, 196,220.28 and 78,528.60

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Solution

The fourth proportional to 142,195.80, 196,220.28 and 78,528.60 is: 108,363.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,195.80 : 196,220.28 = 78,528.60 : x
  2. Step 2: Convert to fraction form
    142,195.80/196,220.28 = 78,528.60/x
  3. Step 3: Cross multiply
    142,195.80x = 196,220.28 × 78,528.60
  4. Step 4: Simplify right side
    142,195.80x = 15,408,903,880.01
  5. Step 5: Solve for x
    x = 15,408,903,880.01/142,195.80
  6. Step 6: Final answer
    x = 108,363.99

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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.