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Finding the Fourth Proportional to 76,625.80, 105,699.87 and 45,990.69

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Solution

The fourth proportional to 76,625.80, 105,699.87 and 45,990.69 is: 63,440.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,625.80 : 105,699.87 = 45,990.69 : x
  2. Step 2: Convert to fraction form
    76,625.80/105,699.87 = 45,990.69/x
  3. Step 3: Cross multiply
    76,625.80x = 105,699.87 × 45,990.69
  4. Step 4: Simplify right side
    76,625.80x = 4,861,209,557.84
  5. Step 5: Solve for x
    x = 4,861,209,557.84/76,625.80
  6. Step 6: Final answer
    x = 63,440.90

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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.