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Finding the Fourth Proportional to 76,603.73, 105,711.62 and 42,611.49

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Solution

The fourth proportional to 76,603.73, 105,711.62 and 42,611.49 is: 58,803.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,603.73 : 105,711.62 = 42,611.49 : x
  2. Step 2: Convert to fraction form
    76,603.73/105,711.62 = 42,611.49/x
  3. Step 3: Cross multiply
    76,603.73x = 105,711.62 × 42,611.49
  4. Step 4: Simplify right side
    76,603.73x = 4,504,529,425.46
  5. Step 5: Solve for x
    x = 4,504,529,425.46/76,603.73
  6. Step 6: Final answer
    x = 58,803.01

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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.