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Finding the Fourth Proportional to 76,903,754.40, 115,355,631.60 and 71,064,496.80

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Solution

The fourth proportional to 76,903,754.40, 115,355,631.60 and 71,064,496.80 is: 106,596,745.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,903,754.40 : 115,355,631.60 = 71,064,496.80 : x
  2. Step 2: Convert to fraction form
    76,903,754.40/115,355,631.60 = 71,064,496.80/x
  3. Step 3: Cross multiply
    76,903,754.40x = 115,355,631.60 × 71,064,496.80
  4. Step 4: Simplify right side
    76,903,754.40x = 8,197,689,912,700,178
  5. Step 5: Solve for x
    x = 8,197,689,912,700,178/76,903,754.40
  6. Step 6: Final answer
    x = 106,596,745.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.