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Finding the Fourth Proportional to 76,556.70, 105,647.40 and 42,564.96

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Solution

The fourth proportional to 76,556.70, 105,647.40 and 42,564.96 is: 58,739.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,556.70 : 105,647.40 = 42,564.96 : x
  2. Step 2: Convert to fraction form
    76,556.70/105,647.40 = 42,564.96/x
  3. Step 3: Cross multiply
    76,556.70x = 105,647.40 × 42,564.96
  4. Step 4: Simplify right side
    76,556.70x = 4,496,877,355.10
  5. Step 5: Solve for x
    x = 4,496,877,355.10/76,556.70
  6. Step 6: Final answer
    x = 58,739.17

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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.