Home / 90,303.12-135,464.28-27,978.48

Finding the Fourth Proportional to 90,303.12, 135,464.28 and 27,978.48

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Solution

The fourth proportional to 90,303.12, 135,464.28 and 27,978.48 is: 41,970.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,303.12 : 135,464.28 = 27,978.48 : x
  2. Step 2: Convert to fraction form
    90,303.12/135,464.28 = 27,978.48/x
  3. Step 3: Cross multiply
    90,303.12x = 135,464.28 × 27,978.48
  4. Step 4: Simplify right side
    90,303.12x = 3,790,084,648.69
  5. Step 5: Solve for x
    x = 3,790,084,648.69/90,303.12
  6. Step 6: Final answer
    x = 41,970.69

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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.