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Finding the Fourth Proportional to 66,590,728.40, 99,892,745.40 and 18,069,352.40

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Solution

The fourth proportional to 66,590,728.40, 99,892,745.40 and 18,069,352.40 is: 27,105,833.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,590,728.40 : 99,892,745.40 = 18,069,352.40 : x
  2. Step 2: Convert to fraction form
    66,590,728.40/99,892,745.40 = 18,069,352.40/x
  3. Step 3: Cross multiply
    66,590,728.40x = 99,892,745.40 × 18,069,352.40
  4. Step 4: Simplify right side
    66,590,728.40x = 1,804,997,218,836,079
  5. Step 5: Solve for x
    x = 1,804,997,218,836,079/66,590,728.40
  6. Step 6: Final answer
    x = 27,105,833.83

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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.