Home / 100,968.12-139,315.55-63,220.50

Finding the Fourth Proportional to 100,968.12, 139,315.55 and 63,220.50

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Solution

The fourth proportional to 100,968.12, 139,315.55 and 63,220.50 is: 87,231.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,968.12 : 139,315.55 = 63,220.50 : x
  2. Step 2: Convert to fraction form
    100,968.12/139,315.55 = 63,220.50/x
  3. Step 3: Cross multiply
    100,968.12x = 139,315.55 × 63,220.50
  4. Step 4: Simplify right side
    100,968.12x = 8,807,598,412.67
  5. Step 5: Solve for x
    x = 8,807,598,412.67/100,968.12
  6. Step 6: Final answer
    x = 87,231.48

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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.