Home / 70,210.72-96,886.20-39,991.60

Finding the Fourth Proportional to 70,210.72, 96,886.20 and 39,991.60

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Solution

The fourth proportional to 70,210.72, 96,886.20 and 39,991.60 is: 55,185.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,210.72 : 96,886.20 = 39,991.60 : x
  2. Step 2: Convert to fraction form
    70,210.72/96,886.20 = 39,991.60/x
  3. Step 3: Cross multiply
    70,210.72x = 96,886.20 × 39,991.60
  4. Step 4: Simplify right side
    70,210.72x = 3,874,634,155.92
  5. Step 5: Solve for x
    x = 3,874,634,155.92/70,210.72
  6. Step 6: Final answer
    x = 55,185.79

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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.