Home / 90,155.36-135,255.12-30,991.84

Finding the Fourth Proportional to 90,155.36, 135,255.12 and 30,991.84

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Solution

The fourth proportional to 90,155.36, 135,255.12 and 30,991.84 is: 46,495.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,155.36 : 135,255.12 = 30,991.84 : x
  2. Step 2: Convert to fraction form
    90,155.36/135,255.12 = 30,991.84/x
  3. Step 3: Cross multiply
    90,155.36x = 135,255.12 × 30,991.84
  4. Step 4: Simplify right side
    90,155.36x = 4,191,805,038.22
  5. Step 5: Solve for x
    x = 4,191,805,038.22/90,155.36
  6. Step 6: Final answer
    x = 46,495.35

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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.