Home / 100,970.16-139,339.80-55,649.04

Finding the Fourth Proportional to 100,970.16, 139,339.80 and 55,649.04

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Solution

The fourth proportional to 100,970.16, 139,339.80 and 55,649.04 is: 76,796.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,970.16 : 139,339.80 = 55,649.04 : x
  2. Step 2: Convert to fraction form
    100,970.16/139,339.80 = 55,649.04/x
  3. Step 3: Cross multiply
    100,970.16x = 139,339.80 × 55,649.04
  4. Step 4: Simplify right side
    100,970.16x = 7,754,126,103.79
  5. Step 5: Solve for x
    x = 7,754,126,103.79/100,970.16
  6. Step 6: Final answer
    x = 76,796.21

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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.