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Finding the Fourth Proportional to 90,412.36, 135,443.54 and 69,533.80

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Solution

The fourth proportional to 90,412.36, 135,443.54 and 69,533.80 is: 104,166.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,412.36 : 135,443.54 = 69,533.80 : x
  2. Step 2: Convert to fraction form
    90,412.36/135,443.54 = 69,533.80/x
  3. Step 3: Cross multiply
    90,412.36x = 135,443.54 × 69,533.80
  4. Step 4: Simplify right side
    90,412.36x = 9,417,904,021.65
  5. Step 5: Solve for x
    x = 9,417,904,021.65/90,412.36
  6. Step 6: Final answer
    x = 104,166.11

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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.