Home / 81,012.15-121,518.23-51,451.20

Finding the Fourth Proportional to 81,012.15, 121,518.23 and 51,451.20

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Solution

The fourth proportional to 81,012.15, 121,518.23 and 51,451.20 is: 77,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,012.15 : 121,518.23 = 51,451.20 : x
  2. Step 2: Convert to fraction form
    81,012.15/121,518.23 = 51,451.20/x
  3. Step 3: Cross multiply
    81,012.15x = 121,518.23 × 51,451.20
  4. Step 4: Simplify right side
    81,012.15x = 6,252,258,498.12
  5. Step 5: Solve for x
    x = 6,252,258,498.12/81,012.15
  6. Step 6: Final answer
    x = 77,176.80

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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.