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Finding the Fourth Proportional to 66,764,280.80, 100,146,421.20 and 55,426,872.80

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Solution

The fourth proportional to 66,764,280.80, 100,146,421.20 and 55,426,872.80 is: 83,140,309.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,764,280.80 : 100,146,421.20 = 55,426,872.80 : x
  2. Step 2: Convert to fraction form
    66,764,280.80/100,146,421.20 = 55,426,872.80/x
  3. Step 3: Cross multiply
    66,764,280.80x = 100,146,421.20 × 55,426,872.80
  4. Step 4: Simplify right side
    66,764,280.80x = 5,550,802,949,227,623
  5. Step 5: Solve for x
    x = 5,550,802,949,227,623/66,764,280.80
  6. Step 6: Final answer
    x = 83,140,309.20

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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.