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Finding the Fourth Proportional to 78,817.60, 108,768.60 and 43,008.35

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Solution

The fourth proportional to 78,817.60, 108,768.60 and 43,008.35 is: 59,351.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,817.60 : 108,768.60 = 43,008.35 : x
  2. Step 2: Convert to fraction form
    78,817.60/108,768.60 = 43,008.35/x
  3. Step 3: Cross multiply
    78,817.60x = 108,768.60 × 43,008.35
  4. Step 4: Simplify right side
    78,817.60x = 4,677,958,017.81
  5. Step 5: Solve for x
    x = 4,677,958,017.81/78,817.60
  6. Step 6: Final answer
    x = 59,351.69

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1.5x scale

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.