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Finding the Fourth Proportional to 74,999.70, 112,317.30 and 39,861.90

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Solution

The fourth proportional to 74,999.70, 112,317.30 and 39,861.90 is: 59,695.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,999.70 : 112,317.30 = 39,861.90 : x
  2. Step 2: Convert to fraction form
    74,999.70/112,317.30 = 39,861.90/x
  3. Step 3: Cross multiply
    74,999.70x = 112,317.30 × 39,861.90
  4. Step 4: Simplify right side
    74,999.70x = 4,477,180,980.87
  5. Step 5: Solve for x
    x = 4,477,180,980.87/74,999.70
  6. Step 6: Final answer
    x = 59,695.99

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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.