Home / 90,651.02-135,311.09-83,971.08

Finding the Fourth Proportional to 90,651.02, 135,311.09 and 83,971.08

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Solution

The fourth proportional to 90,651.02, 135,311.09 and 83,971.08 is: 125,340.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,651.02 : 135,311.09 = 83,971.08 : x
  2. Step 2: Convert to fraction form
    90,651.02/135,311.09 = 83,971.08/x
  3. Step 3: Cross multiply
    90,651.02x = 135,311.09 × 83,971.08
  4. Step 4: Simplify right side
    90,651.02x = 11,362,217,943.42
  5. Step 5: Solve for x
    x = 11,362,217,943.42/90,651.02
  6. Step 6: Final answer
    x = 125,340.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.