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Finding the Fourth Proportional to 76,481.60, 105,561.52 and 42,501.76

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Solution

The fourth proportional to 76,481.60, 105,561.52 and 42,501.76 is: 58,661.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,481.60 : 105,561.52 = 42,501.76 : x
  2. Step 2: Convert to fraction form
    76,481.60/105,561.52 = 42,501.76/x
  3. Step 3: Cross multiply
    76,481.60x = 105,561.52 × 42,501.76
  4. Step 4: Simplify right side
    76,481.60x = 4,486,550,388.28
  5. Step 5: Solve for x
    x = 4,486,550,388.28/76,481.60
  6. Step 6: Final answer
    x = 58,661.83

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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.