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Finding the Fourth Proportional to 100,752.62, 139,039.19 and 55,435.34

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Solution

The fourth proportional to 100,752.62, 139,039.19 and 55,435.34 is: 76,501.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,752.62 : 139,039.19 = 55,435.34 : x
  2. Step 2: Convert to fraction form
    100,752.62/139,039.19 = 55,435.34/x
  3. Step 3: Cross multiply
    100,752.62x = 139,039.19 × 55,435.34
  4. Step 4: Simplify right side
    100,752.62x = 7,707,683,798.60
  5. Step 5: Solve for x
    x = 7,707,683,798.60/100,752.62
  6. Step 6: Final answer
    x = 76,501.08

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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.