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Finding the Fourth Proportional to 47,319,266.70, 70,978,900.05 and 31,163,460.30

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Solution

The fourth proportional to 47,319,266.70, 70,978,900.05 and 31,163,460.30 is: 46,745,190.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,319,266.70 : 70,978,900.05 = 31,163,460.30 : x
  2. Step 2: Convert to fraction form
    47,319,266.70/70,978,900.05 = 31,163,460.30/x
  3. Step 3: Cross multiply
    47,319,266.70x = 70,978,900.05 × 31,163,460.30
  4. Step 4: Simplify right side
    47,319,266.70x = 2,211,948,133,845,843
  5. Step 5: Solve for x
    x = 2,211,948,133,845,843/47,319,266.70
  6. Step 6: Final answer
    x = 46,745,190.45

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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.