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Finding the Fourth Proportional to 103,672, 155,415.42 and 40,477.42

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Solution

The fourth proportional to 103,672, 155,415.42 and 40,477.42 is: 60,679.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,672 : 155,415.42 = 40,477.42 : x
  2. Step 2: Convert to fraction form
    103,672/155,415.42 = 40,477.42/x
  3. Step 3: Cross multiply
    103,672x = 155,415.42 × 40,477.42
  4. Step 4: Simplify right side
    103,672x = 6,290,815,229.82
  5. Step 5: Solve for x
    x = 6,290,815,229.82/103,672
  6. Step 6: Final answer
    x = 60,679.98

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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.