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Finding the Fourth Proportional to 76,670.79, 105,808.79 and 42,677.12

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Solution

The fourth proportional to 76,670.79, 105,808.79 and 42,677.12 is: 58,896.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,670.79 : 105,808.79 = 42,677.12 : x
  2. Step 2: Convert to fraction form
    76,670.79/105,808.79 = 42,677.12/x
  3. Step 3: Cross multiply
    76,670.79x = 105,808.79 × 42,677.12
  4. Step 4: Simplify right side
    76,670.79x = 4,515,613,898.84
  5. Step 5: Solve for x
    x = 4,515,613,898.84/76,670.79
  6. Step 6: Final answer
    x = 58,896.15

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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.