Home / 90,661.32-135,955.07-40,728.00

Finding the Fourth Proportional to 90,661.32, 135,955.07 and 40,728.00

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Solution

The fourth proportional to 90,661.32, 135,955.07 and 40,728.00 is: 61,075.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,661.32 : 135,955.07 = 40,728.00 : x
  2. Step 2: Convert to fraction form
    90,661.32/135,955.07 = 40,728.00/x
  3. Step 3: Cross multiply
    90,661.32x = 135,955.07 × 40,728.00
  4. Step 4: Simplify right side
    90,661.32x = 5,537,177,547.43
  5. Step 5: Solve for x
    x = 5,537,177,547.43/90,661.32
  6. Step 6: Final answer
    x = 61,075.42

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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.