Home / 66,412.16-99,618-19,661.36

Finding the Fourth Proportional to 66,412.16, 99,618 and 19,661.36

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Solution

The fourth proportional to 66,412.16, 99,618 and 19,661.36 is: 29,491.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,412.16 : 99,618 = 19,661.36 : x
  2. Step 2: Convert to fraction form
    66,412.16/99,618 = 19,661.36/x
  3. Step 3: Cross multiply
    66,412.16x = 99,618 × 19,661.36
  4. Step 4: Simplify right side
    66,412.16x = 1,958,625,360.48
  5. Step 5: Solve for x
    x = 1,958,625,360.48/66,412.16
  6. Step 6: Final answer
    x = 29,491.97

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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.