Home / 90,991.36-136,461.12-57,661.12

Finding the Fourth Proportional to 90,991.36, 136,461.12 and 57,661.12

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Solution

The fourth proportional to 90,991.36, 136,461.12 and 57,661.12 is: 86,475.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,991.36 : 136,461.12 = 57,661.12 : x
  2. Step 2: Convert to fraction form
    90,991.36/136,461.12 = 57,661.12/x
  3. Step 3: Cross multiply
    90,991.36x = 136,461.12 × 57,661.12
  4. Step 4: Simplify right side
    90,991.36x = 7,868,501,015.65
  5. Step 5: Solve for x
    x = 7,868,501,015.65/90,991.36
  6. Step 6: Final answer
    x = 86,475.25

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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.