Home / 112,491.69-155,366.16-76,619.49

Finding the Fourth Proportional to 112,491.69, 155,366.16 and 76,619.49

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Solution

The fourth proportional to 112,491.69, 155,366.16 and 76,619.49 is: 105,821.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,491.69 : 155,366.16 = 76,619.49 : x
  2. Step 2: Convert to fraction form
    112,491.69/155,366.16 = 76,619.49/x
  3. Step 3: Cross multiply
    112,491.69x = 155,366.16 × 76,619.49
  4. Step 4: Simplify right side
    112,491.69x = 11,904,075,942.46
  5. Step 5: Solve for x
    x = 11,904,075,942.46/112,491.69
  6. Step 6: Final answer
    x = 105,821.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.