Home / 285,986.09-428,981.59-72,754.20

Finding the Fourth Proportional to 285,986.09, 428,981.59 and 72,754.20

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Solution

The fourth proportional to 285,986.09, 428,981.59 and 72,754.20 is: 109,131.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,986.09 : 428,981.59 = 72,754.20 : x
  2. Step 2: Convert to fraction form
    285,986.09/428,981.59 = 72,754.20/x
  3. Step 3: Cross multiply
    285,986.09x = 428,981.59 × 72,754.20
  4. Step 4: Simplify right side
    285,986.09x = 31,210,212,076.88
  5. Step 5: Solve for x
    x = 31,210,212,076.88/285,986.09
  6. Step 6: Final answer
    x = 109,131.92

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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.