Home / 90,003.40-135,005.10-40,107.40

Finding the Fourth Proportional to 90,003.40, 135,005.10 and 40,107.40

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Solution

The fourth proportional to 90,003.40, 135,005.10 and 40,107.40 is: 60,161.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,003.40 : 135,005.10 = 40,107.40 : x
  2. Step 2: Convert to fraction form
    90,003.40/135,005.10 = 40,107.40/x
  3. Step 3: Cross multiply
    90,003.40x = 135,005.10 × 40,107.40
  4. Step 4: Simplify right side
    90,003.40x = 5,414,703,547.74
  5. Step 5: Solve for x
    x = 5,414,703,547.74/90,003.40
  6. Step 6: Final answer
    x = 60,161.10

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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.