Home / 142,439.60-196,560.72-77,907.84

Finding the Fourth Proportional to 142,439.60, 196,560.72 and 77,907.84

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Solution

The fourth proportional to 142,439.60, 196,560.72 and 77,907.84 is: 107,509.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,439.60 : 196,560.72 = 77,907.84 : x
  2. Step 2: Convert to fraction form
    142,439.60/196,560.72 = 77,907.84/x
  3. Step 3: Cross multiply
    142,439.60x = 196,560.72 × 77,907.84
  4. Step 4: Simplify right side
    142,439.60x = 15,313,621,124.04
  5. Step 5: Solve for x
    x = 15,313,621,124.04/142,439.60
  6. Step 6: Final answer
    x = 107,509.58

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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.