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Finding the Fourth Proportional to 76,599.86, 105,707.79 and 43,065.86

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Solution

The fourth proportional to 76,599.86, 105,707.79 and 43,065.86 is: 59,430.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,599.86 : 105,707.79 = 43,065.86 : x
  2. Step 2: Convert to fraction form
    76,599.86/105,707.79 = 43,065.86/x
  3. Step 3: Cross multiply
    76,599.86x = 105,707.79 × 43,065.86
  4. Step 4: Simplify right side
    76,599.86x = 4,552,396,356.51
  5. Step 5: Solve for x
    x = 4,552,396,356.51/76,599.86
  6. Step 6: Final answer
    x = 59,430.87

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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.