Home / 142,038.63-196,007.58-78,375.60

Finding the Fourth Proportional to 142,038.63, 196,007.58 and 78,375.60

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Solution

The fourth proportional to 142,038.63, 196,007.58 and 78,375.60 is: 108,155.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,038.63 : 196,007.58 = 78,375.60 : x
  2. Step 2: Convert to fraction form
    142,038.63/196,007.58 = 78,375.60/x
  3. Step 3: Cross multiply
    142,038.63x = 196,007.58 × 78,375.60
  4. Step 4: Simplify right side
    142,038.63x = 15,362,211,687.05
  5. Step 5: Solve for x
    x = 15,362,211,687.05/142,038.63
  6. Step 6: Final answer
    x = 108,155.17

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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.