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Finding the Fourth Proportional to 76,579.92, 105,679.35 and 43,045.92

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Solution

The fourth proportional to 76,579.92, 105,679.35 and 43,045.92 is: 59,402.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,579.92 : 105,679.35 = 43,045.92 : x
  2. Step 2: Convert to fraction form
    76,579.92/105,679.35 = 43,045.92/x
  3. Step 3: Cross multiply
    76,579.92x = 105,679.35 × 43,045.92
  4. Step 4: Simplify right side
    76,579.92x = 4,549,064,845.75
  5. Step 5: Solve for x
    x = 4,549,064,845.75/76,579.92
  6. Step 6: Final answer
    x = 59,402.84

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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.