Home / 112,139.20-168,208.80-70,667.20

Finding the Fourth Proportional to 112,139.20, 168,208.80 and 70,667.20

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Solution

The fourth proportional to 112,139.20, 168,208.80 and 70,667.20 is: 106,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,139.20 : 168,208.80 = 70,667.20 : x
  2. Step 2: Convert to fraction form
    112,139.20/168,208.80 = 70,667.20/x
  3. Step 3: Cross multiply
    112,139.20x = 168,208.80 × 70,667.20
  4. Step 4: Simplify right side
    112,139.20x = 11,886,844,911.36
  5. Step 5: Solve for x
    x = 11,886,844,911.36/112,139.20
  6. Step 6: Final answer
    x = 106,000.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.