Home / 76,647.12-105,743.64-56,551.92

Finding the Fourth Proportional to 76,647.12, 105,743.64 and 56,551.92

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Solution

The fourth proportional to 76,647.12, 105,743.64 and 56,551.92 is: 78,019.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,647.12 : 105,743.64 = 56,551.92 : x
  2. Step 2: Convert to fraction form
    76,647.12/105,743.64 = 56,551.92/x
  3. Step 3: Cross multiply
    76,647.12x = 105,743.64 × 56,551.92
  4. Step 4: Simplify right side
    76,647.12x = 5,980,005,869.79
  5. Step 5: Solve for x
    x = 5,980,005,869.79/76,647.12
  6. Step 6: Final answer
    x = 78,019.97

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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.