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Finding the Fourth Proportional to 100,955.01, 139,317.30 and 55,632

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Solution

The fourth proportional to 100,955.01, 139,317.30 and 55,632 is: 76,771.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,955.01 : 139,317.30 = 55,632 : x
  2. Step 2: Convert to fraction form
    100,955.01/139,317.30 = 55,632/x
  3. Step 3: Cross multiply
    100,955.01x = 139,317.30 × 55,632
  4. Step 4: Simplify right side
    100,955.01x = 7,750,500,033.60
  5. Step 5: Solve for x
    x = 7,750,500,033.60/100,955.01
  6. Step 6: Final answer
    x = 76,771.82

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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.