Home / 90,276.41-135,288.86-74,669.33

Finding the Fourth Proportional to 90,276.41, 135,288.86 and 74,669.33

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Solution

The fourth proportional to 90,276.41, 135,288.86 and 74,669.33 is: 111,899.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,276.41 : 135,288.86 = 74,669.33 : x
  2. Step 2: Convert to fraction form
    90,276.41/135,288.86 = 74,669.33/x
  3. Step 3: Cross multiply
    90,276.41x = 135,288.86 × 74,669.33
  4. Step 4: Simplify right side
    90,276.41x = 10,101,927,482.87
  5. Step 5: Solve for x
    x = 10,101,927,482.87/90,276.41
  6. Step 6: Final answer
    x = 111,899.98

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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.