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Finding the Fourth Proportional to 78,990.68, 118,383.96 and 59,113.28

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Solution

The fourth proportional to 78,990.68, 118,383.96 and 59,113.28 is: 88,593.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,990.68 : 118,383.96 = 59,113.28 : x
  2. Step 2: Convert to fraction form
    78,990.68/118,383.96 = 59,113.28/x
  3. Step 3: Cross multiply
    78,990.68x = 118,383.96 × 59,113.28
  4. Step 4: Simplify right side
    78,990.68x = 6,998,064,174.99
  5. Step 5: Solve for x
    x = 6,998,064,174.99/78,990.68
  6. Step 6: Final answer
    x = 88,593.54

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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.