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Finding the Fourth Proportional to 7,009,990.80, 9,840,529.20 and 7,009,990.80

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Solution

The fourth proportional to 7,009,990.80, 9,840,529.20 and 7,009,990.80 is: 9,840,529.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,009,990.80 : 9,840,529.20 = 7,009,990.80 : x
  2. Step 2: Convert to fraction form
    7,009,990.80/9,840,529.20 = 7,009,990.80/x
  3. Step 3: Cross multiply
    7,009,990.80x = 9,840,529.20 × 7,009,990.80
  4. Step 4: Simplify right side
    7,009,990.80x = 68,982,019,159,131.35
  5. Step 5: Solve for x
    x = 68,982,019,159,131.35/7,009,990.80
  6. Step 6: Final answer
    x = 9,840,529.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.