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Finding the Fourth Proportional to 201,079,807.20, 301,619,710.80 and 71,691,638.40

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Solution

The fourth proportional to 201,079,807.20, 301,619,710.80 and 71,691,638.40 is: 107,537,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,079,807.20 : 301,619,710.80 = 71,691,638.40 : x
  2. Step 2: Convert to fraction form
    201,079,807.20/301,619,710.80 = 71,691,638.40/x
  3. Step 3: Cross multiply
    201,079,807.20x = 301,619,710.80 × 71,691,638.40
  4. Step 4: Simplify right side
    201,079,807.20x = 21,623,611,240,986,176
  5. Step 5: Solve for x
    x = 21,623,611,240,986,176/201,079,807.20
  6. Step 6: Final answer
    x = 107,537,457.60

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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.