Home / 100,753.02-139,039.16-55,430.02

Finding the Fourth Proportional to 100,753.02, 139,039.16 and 55,430.02

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Solution

The fourth proportional to 100,753.02, 139,039.16 and 55,430.02 is: 76,493.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,753.02 : 139,039.16 = 55,430.02 : x
  2. Step 2: Convert to fraction form
    100,753.02/139,039.16 = 55,430.02/x
  3. Step 3: Cross multiply
    100,753.02x = 139,039.16 × 55,430.02
  4. Step 4: Simplify right side
    100,753.02x = 7,706,943,419.58
  5. Step 5: Solve for x
    x = 7,706,943,419.58/100,753.02
  6. Step 6: Final answer
    x = 76,493.42

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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.