Home / 142,647.92-196,855.08-78,989.84

Finding the Fourth Proportional to 142,647.92, 196,855.08 and 78,989.84

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Solution

The fourth proportional to 142,647.92, 196,855.08 and 78,989.84 is: 109,006.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,647.92 : 196,855.08 = 78,989.84 : x
  2. Step 2: Convert to fraction form
    142,647.92/196,855.08 = 78,989.84/x
  3. Step 3: Cross multiply
    142,647.92x = 196,855.08 × 78,989.84
  4. Step 4: Simplify right side
    142,647.92x = 15,549,551,272.39
  5. Step 5: Solve for x
    x = 15,549,551,272.39/142,647.92
  6. Step 6: Final answer
    x = 109,006.51

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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.