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Finding the Fourth Proportional to 76,671.01, 105,776.85 and 56,575.99

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Solution

The fourth proportional to 76,671.01, 105,776.85 and 56,575.99 is: 78,053.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,671.01 : 105,776.85 = 56,575.99 : x
  2. Step 2: Convert to fraction form
    76,671.01/105,776.85 = 56,575.99/x
  3. Step 3: Cross multiply
    76,671.01x = 105,776.85 × 56,575.99
  4. Step 4: Simplify right side
    76,671.01x = 5,984,430,007.83
  5. Step 5: Solve for x
    x = 5,984,430,007.83/76,671.01
  6. Step 6: Final answer
    x = 78,053.36

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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.