Home / 90,085.80-135,145.62-30,929.88

Finding the Fourth Proportional to 90,085.80, 135,145.62 and 30,929.88

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Solution

The fourth proportional to 90,085.80, 135,145.62 and 30,929.88 is: 46,400.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,085.80 : 135,145.62 = 30,929.88 : x
  2. Step 2: Convert to fraction form
    90,085.80/135,145.62 = 30,929.88/x
  3. Step 3: Cross multiply
    90,085.80x = 135,145.62 × 30,929.88
  4. Step 4: Simplify right side
    90,085.80x = 4,180,037,809.13
  5. Step 5: Solve for x
    x = 4,180,037,809.13/90,085.80
  6. Step 6: Final answer
    x = 46,400.63

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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.