Home / 76,769.28-105,939.96-42,777.60

Finding the Fourth Proportional to 76,769.28, 105,939.96 and 42,777.60

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Solution

The fourth proportional to 76,769.28, 105,939.96 and 42,777.60 is: 59,032.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,769.28 : 105,939.96 = 42,777.60 : x
  2. Step 2: Convert to fraction form
    76,769.28/105,939.96 = 42,777.60/x
  3. Step 3: Cross multiply
    76,769.28x = 105,939.96 × 42,777.60
  4. Step 4: Simplify right side
    76,769.28x = 4,531,857,232.90
  5. Step 5: Solve for x
    x = 4,531,857,232.90/76,769.28
  6. Step 6: Final answer
    x = 59,032.17

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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.