Home / 142,857.12-197,152.74-79,200.84

Finding the Fourth Proportional to 142,857.12, 197,152.74 and 79,200.84

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Solution

The fourth proportional to 142,857.12, 197,152.74 and 79,200.84 is: 109,302.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,857.12 : 197,152.74 = 79,200.84 : x
  2. Step 2: Convert to fraction form
    142,857.12/197,152.74 = 79,200.84/x
  3. Step 3: Cross multiply
    142,857.12x = 197,152.74 × 79,200.84
  4. Step 4: Simplify right side
    142,857.12x = 15,614,662,616.30
  5. Step 5: Solve for x
    x = 15,614,662,616.30/142,857.12
  6. Step 6: Final answer
    x = 109,302.66

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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.