Home / 142,128.04-196,135.38-78,464.44

Finding the Fourth Proportional to 142,128.04, 196,135.38 and 78,464.44

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Solution

The fourth proportional to 142,128.04, 196,135.38 and 78,464.44 is: 108,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,128.04 : 196,135.38 = 78,464.44 : x
  2. Step 2: Convert to fraction form
    142,128.04/196,135.38 = 78,464.44/x
  3. Step 3: Cross multiply
    142,128.04x = 196,135.38 × 78,464.44
  4. Step 4: Simplify right side
    142,128.04x = 15,389,652,755.89
  5. Step 5: Solve for x
    x = 15,389,652,755.89/142,128.04
  6. Step 6: Final answer
    x = 108,280.20

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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.