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Finding the Fourth Proportional to 70,481,835.90, 105,722,753.85 and 65,698,866.90

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Solution

The fourth proportional to 70,481,835.90, 105,722,753.85 and 65,698,866.90 is: 98,548,300.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,481,835.90 : 105,722,753.85 = 65,698,866.90 : x
  2. Step 2: Convert to fraction form
    70,481,835.90/105,722,753.85 = 65,698,866.90/x
  3. Step 3: Cross multiply
    70,481,835.90x = 105,722,753.85 × 65,698,866.90
  4. Step 4: Simplify right side
    70,481,835.90x = 6,945,865,133,492,612
  5. Step 5: Solve for x
    x = 6,945,865,133,492,612/70,481,835.90
  6. Step 6: Final answer
    x = 98,548,300.35

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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.