Home / 142,014.88-195,979.40-78,355.36

Finding the Fourth Proportional to 142,014.88, 195,979.40 and 78,355.36

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Solution

The fourth proportional to 142,014.88, 195,979.40 and 78,355.36 is: 108,129.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,014.88 : 195,979.40 = 78,355.36 : x
  2. Step 2: Convert to fraction form
    142,014.88/195,979.40 = 78,355.36/x
  3. Step 3: Cross multiply
    142,014.88x = 195,979.40 × 78,355.36
  4. Step 4: Simplify right side
    142,014.88x = 15,356,036,439.58
  5. Step 5: Solve for x
    x = 15,356,036,439.58/142,014.88
  6. Step 6: Final answer
    x = 108,129.77

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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.