Home / 142,870.12-197,165.44-79,213.84

Finding the Fourth Proportional to 142,870.12, 197,165.44 and 79,213.84

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Solution

The fourth proportional to 142,870.12, 197,165.44 and 79,213.84 is: 109,317.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,870.12 : 197,165.44 = 79,213.84 : x
  2. Step 2: Convert to fraction form
    142,870.12/197,165.44 = 79,213.84/x
  3. Step 3: Cross multiply
    142,870.12x = 197,165.44 × 79,213.84
  4. Step 4: Simplify right side
    142,870.12x = 15,618,231,617.69
  5. Step 5: Solve for x
    x = 15,618,231,617.69/142,870.12
  6. Step 6: Final answer
    x = 109,317.69

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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.