Home / 112,281.12-154,962.72-78,267.60

Finding the Fourth Proportional to 112,281.12, 154,962.72 and 78,267.60

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Solution

The fourth proportional to 112,281.12, 154,962.72 and 78,267.60 is: 108,019.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,281.12 : 154,962.72 = 78,267.60 : x
  2. Step 2: Convert to fraction form
    112,281.12/154,962.72 = 78,267.60/x
  3. Step 3: Cross multiply
    112,281.12x = 154,962.72 × 78,267.60
  4. Step 4: Simplify right side
    112,281.12x = 12,128,560,183.87
  5. Step 5: Solve for x
    x = 12,128,560,183.87/112,281.12
  6. Step 6: Final answer
    x = 108,019.59

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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.