Home / 90,041.31-135,081.56-30,878.40

Finding the Fourth Proportional to 90,041.31, 135,081.56 and 30,878.40

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Solution

The fourth proportional to 90,041.31, 135,081.56 and 30,878.40 is: 46,324.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,041.31 : 135,081.56 = 30,878.40 : x
  2. Step 2: Convert to fraction form
    90,041.31/135,081.56 = 30,878.40/x
  3. Step 3: Cross multiply
    90,041.31x = 135,081.56 × 30,878.40
  4. Step 4: Simplify right side
    90,041.31x = 4,171,102,442.30
  5. Step 5: Solve for x
    x = 4,171,102,442.30/90,041.31
  6. Step 6: Final answer
    x = 46,324.32

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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.