Home / 142,344.02-196,427.07-78,678.02

Finding the Fourth Proportional to 142,344.02, 196,427.07 and 78,678.02

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Solution

The fourth proportional to 142,344.02, 196,427.07 and 78,678.02 is: 108,571.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,344.02 : 196,427.07 = 78,678.02 : x
  2. Step 2: Convert to fraction form
    142,344.02/196,427.07 = 78,678.02/x
  3. Step 3: Cross multiply
    142,344.02x = 196,427.07 × 78,678.02
  4. Step 4: Simplify right side
    142,344.02x = 15,454,491,959.87
  5. Step 5: Solve for x
    x = 15,454,491,959.87/142,344.02
  6. Step 6: Final answer
    x = 108,571.42

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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.