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Finding the Fourth Proportional to 76,362.54, 105,400.36 and 42,839.34

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Solution

The fourth proportional to 76,362.54, 105,400.36 and 42,839.34 is: 59,129.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,362.54 : 105,400.36 = 42,839.34 : x
  2. Step 2: Convert to fraction form
    76,362.54/105,400.36 = 42,839.34/x
  3. Step 3: Cross multiply
    76,362.54x = 105,400.36 × 42,839.34
  4. Step 4: Simplify right side
    76,362.54x = 4,515,281,858.16
  5. Step 5: Solve for x
    x = 4,515,281,858.16/76,362.54
  6. Step 6: Final answer
    x = 59,129.54

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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.