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Finding the Fourth Proportional to 76,804.68, 105,991.26 and 42,816.14

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Solution

The fourth proportional to 76,804.68, 105,991.26 and 42,816.14 is: 59,086.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,804.68 : 105,991.26 = 42,816.14 : x
  2. Step 2: Convert to fraction form
    76,804.68/105,991.26 = 42,816.14/x
  3. Step 3: Cross multiply
    76,804.68x = 105,991.26 × 42,816.14
  4. Step 4: Simplify right side
    76,804.68x = 4,538,136,626.94
  5. Step 5: Solve for x
    x = 4,538,136,626.94/76,804.68
  6. Step 6: Final answer
    x = 59,086.72

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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.