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Finding the Fourth Proportional to 74,620.34, 102,978.60 and 40,630.15

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Solution

The fourth proportional to 74,620.34, 102,978.60 and 40,630.15 is: 56,070.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,620.34 : 102,978.60 = 40,630.15 : x
  2. Step 2: Convert to fraction form
    74,620.34/102,978.60 = 40,630.15/x
  3. Step 3: Cross multiply
    74,620.34x = 102,978.60 × 40,630.15
  4. Step 4: Simplify right side
    74,620.34x = 4,184,035,707.34
  5. Step 5: Solve for x
    x = 4,184,035,707.34/74,620.34
  6. Step 6: Final answer
    x = 56,070.98

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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.