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Finding the Fourth Proportional to 66,403,866.60, 99,605,799.90 and 18,534,810.60

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Solution

The fourth proportional to 66,403,866.60, 99,605,799.90 and 18,534,810.60 is: 27,802,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,403,866.60 : 99,605,799.90 = 18,534,810.60 : x
  2. Step 2: Convert to fraction form
    66,403,866.60/99,605,799.90 = 18,534,810.60/x
  3. Step 3: Cross multiply
    66,403,866.60x = 99,605,799.90 × 18,534,810.60
  4. Step 4: Simplify right side
    66,403,866.60x = 1,846,174,635,807,999.25
  5. Step 5: Solve for x
    x = 1,846,174,635,807,999.25/66,403,866.60
  6. Step 6: Final answer
    x = 27,802,215.90

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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.