Home / 100,981.76-151,473-30,860.78

Finding the Fourth Proportional to 100,981.76, 151,473 and 30,860.78

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Solution

The fourth proportional to 100,981.76, 151,473 and 30,860.78 is: 46,291.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,981.76 : 151,473 = 30,860.78 : x
  2. Step 2: Convert to fraction form
    100,981.76/151,473 = 30,860.78/x
  3. Step 3: Cross multiply
    100,981.76x = 151,473 × 30,860.78
  4. Step 4: Simplify right side
    100,981.76x = 4,674,574,928.94
  5. Step 5: Solve for x
    x = 4,674,574,928.94/100,981.76
  6. Step 6: Final answer
    x = 46,291.28

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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.