Home / 105,067.80-157,428.90-87,442.20

Finding the Fourth Proportional to 105,067.80, 157,428.90 and 87,442.20

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Solution

The fourth proportional to 105,067.80, 157,428.90 and 87,442.20 is: 131,019.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,067.80 : 157,428.90 = 87,442.20 : x
  2. Step 2: Convert to fraction form
    105,067.80/157,428.90 = 87,442.20/x
  3. Step 3: Cross multiply
    105,067.80x = 157,428.90 × 87,442.20
  4. Step 4: Simplify right side
    105,067.80x = 13,765,929,359.58
  5. Step 5: Solve for x
    x = 13,765,929,359.58/105,067.80
  6. Step 6: Final answer
    x = 131,019.49

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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.