Home / 142,000.23-195,960.30-78,338.02

Finding the Fourth Proportional to 142,000.23, 195,960.30 and 78,338.02

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Solution

The fourth proportional to 142,000.23, 195,960.30 and 78,338.02 is: 108,106.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,000.23 : 195,960.30 = 78,338.02 : x
  2. Step 2: Convert to fraction form
    142,000.23/195,960.30 = 78,338.02/x
  3. Step 3: Cross multiply
    142,000.23x = 195,960.30 × 78,338.02
  4. Step 4: Simplify right side
    142,000.23x = 15,351,141,900.61
  5. Step 5: Solve for x
    x = 15,351,141,900.61/142,000.23
  6. Step 6: Final answer
    x = 108,106.46

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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.