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Finding the Fourth Proportional to 103,365.66, 154,840.88 and 47,128.41

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Solution

The fourth proportional to 103,365.66, 154,840.88 and 47,128.41 is: 70,597.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,365.66 : 154,840.88 = 47,128.41 : x
  2. Step 2: Convert to fraction form
    103,365.66/154,840.88 = 47,128.41/x
  3. Step 3: Cross multiply
    103,365.66x = 154,840.88 × 47,128.41
  4. Step 4: Simplify right side
    103,365.66x = 7,297,403,703.20
  5. Step 5: Solve for x
    x = 7,297,403,703.20/103,365.66
  6. Step 6: Final answer
    x = 70,597.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.