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Finding the Fourth Proportional to 66,321,028.80, 99,387,064.80 and 48,913,383.60

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Solution

The fourth proportional to 66,321,028.80, 99,387,064.80 and 48,913,383.60 is: 73,300,395.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,321,028.80 : 99,387,064.80 = 48,913,383.60 : x
  2. Step 2: Convert to fraction form
    66,321,028.80/99,387,064.80 = 48,913,383.60/x
  3. Step 3: Cross multiply
    66,321,028.80x = 99,387,064.80 × 48,913,383.60
  4. Step 4: Simplify right side
    66,321,028.80x = 4,861,357,625,440,457
  5. Step 5: Solve for x
    x = 4,861,357,625,440,457/66,321,028.80
  6. Step 6: Final answer
    x = 73,300,395.27

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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.