Home / 142,003.42-195,965.38-78,341.20

Finding the Fourth Proportional to 142,003.42, 195,965.38 and 78,341.20

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Solution

The fourth proportional to 142,003.42, 195,965.38 and 78,341.20 is: 108,111.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,003.42 : 195,965.38 = 78,341.20 : x
  2. Step 2: Convert to fraction form
    142,003.42/195,965.38 = 78,341.20/x
  3. Step 3: Cross multiply
    142,003.42x = 195,965.38 × 78,341.20
  4. Step 4: Simplify right side
    142,003.42x = 15,352,163,027.66
  5. Step 5: Solve for x
    x = 15,352,163,027.66/142,003.42
  6. Step 6: Final answer
    x = 108,111.22

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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.