Home / 76,659.12-105,760.08-56,564.28

Finding the Fourth Proportional to 76,659.12, 105,760.08 and 56,564.28

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Solution

The fourth proportional to 76,659.12, 105,760.08 and 56,564.28 is: 78,036.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,659.12 : 105,760.08 = 56,564.28 : x
  2. Step 2: Convert to fraction form
    76,659.12/105,760.08 = 56,564.28/x
  3. Step 3: Cross multiply
    76,659.12x = 105,760.08 × 56,564.28
  4. Step 4: Simplify right side
    76,659.12x = 5,982,242,777.94
  5. Step 5: Solve for x
    x = 5,982,242,777.94/76,659.12
  6. Step 6: Final answer
    x = 78,036.94

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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.