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Finding the Fourth Proportional to 100,673.40, 138,913.74 and 58,235.88

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Solution

The fourth proportional to 100,673.40, 138,913.74 and 58,235.88 is: 80,356.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,673.40 : 138,913.74 = 58,235.88 : x
  2. Step 2: Convert to fraction form
    100,673.40/138,913.74 = 58,235.88/x
  3. Step 3: Cross multiply
    100,673.40x = 138,913.74 × 58,235.88
  4. Step 4: Simplify right side
    100,673.40x = 8,089,763,892.99
  5. Step 5: Solve for x
    x = 8,089,763,892.99/100,673.40
  6. Step 6: Final answer
    x = 80,356.52

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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.