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Finding the Fourth Proportional to 78,643.60, 108,529.32 and 44,650.96

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Solution

The fourth proportional to 78,643.60, 108,529.32 and 44,650.96 is: 61,618.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,643.60 : 108,529.32 = 44,650.96 : x
  2. Step 2: Convert to fraction form
    78,643.60/108,529.32 = 44,650.96/x
  3. Step 3: Cross multiply
    78,643.60x = 108,529.32 × 44,650.96
  4. Step 4: Simplify right side
    78,643.60x = 4,845,938,326.15
  5. Step 5: Solve for x
    x = 4,845,938,326.15/78,643.60
  6. Step 6: Final answer
    x = 61,618.98

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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.