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Finding the Fourth Proportional to 71,163,458.80, 106,762,684.20 and 20,044,812.40

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Solution

The fourth proportional to 71,163,458.80, 106,762,684.20 and 20,044,812.40 is: 30,072,146.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,163,458.80 : 106,762,684.20 = 20,044,812.40 : x
  2. Step 2: Convert to fraction form
    71,163,458.80/106,762,684.20 = 20,044,812.40/x
  3. Step 3: Cross multiply
    71,163,458.80x = 106,762,684.20 × 20,044,812.40
  4. Step 4: Simplify right side
    71,163,458.80x = 2,140,037,976,109,444
  5. Step 5: Solve for x
    x = 2,140,037,976,109,444/71,163,458.80
  6. Step 6: Final answer
    x = 30,072,146.75

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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.