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Finding the Fourth Proportional to 137,662,666.40, 206,493,999.60 and 60,904,215.20

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Solution

The fourth proportional to 137,662,666.40, 206,493,999.60 and 60,904,215.20 is: 91,356,322.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,662,666.40 : 206,493,999.60 = 60,904,215.20 : x
  2. Step 2: Convert to fraction form
    137,662,666.40/206,493,999.60 = 60,904,215.20/x
  3. Step 3: Cross multiply
    137,662,666.40x = 206,493,999.60 × 60,904,215.20
  4. Step 4: Simplify right side
    137,662,666.40x = 12,576,354,989,147,114
  5. Step 5: Solve for x
    x = 12,576,354,989,147,114/137,662,666.40
  6. Step 6: Final answer
    x = 91,356,322.80

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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.