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Finding the Fourth Proportional to 76,663.80, 105,795.96 and 43,129.80

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Solution

The fourth proportional to 76,663.80, 105,795.96 and 43,129.80 is: 59,519.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,663.80 : 105,795.96 = 43,129.80 : x
  2. Step 2: Convert to fraction form
    76,663.80/105,795.96 = 43,129.80/x
  3. Step 3: Cross multiply
    76,663.80x = 105,795.96 × 43,129.80
  4. Step 4: Simplify right side
    76,663.80x = 4,562,958,595.61
  5. Step 5: Solve for x
    x = 4,562,958,595.61/76,663.80
  6. Step 6: Final answer
    x = 59,519.08

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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.