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Finding the Fourth Proportional to 76,700.66, 105,879.58 and 51,564.74

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Solution

The fourth proportional to 76,700.66, 105,879.58 and 51,564.74 is: 71,181.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,700.66 : 105,879.58 = 51,564.74 : x
  2. Step 2: Convert to fraction form
    76,700.66/105,879.58 = 51,564.74/x
  3. Step 3: Cross multiply
    76,700.66x = 105,879.58 × 51,564.74
  4. Step 4: Simplify right side
    76,700.66x = 5,459,653,014.01
  5. Step 5: Solve for x
    x = 5,459,653,014.01/76,700.66
  6. Step 6: Final answer
    x = 71,181.30

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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.