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Finding the Fourth Proportional to 485,199.89, 727,699.59 and 130,129.50

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Solution

The fourth proportional to 485,199.89, 727,699.59 and 130,129.50 is: 195,167.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,199.89 : 727,699.59 = 130,129.50 : x
  2. Step 2: Convert to fraction form
    485,199.89/727,699.59 = 130,129.50/x
  3. Step 3: Cross multiply
    485,199.89x = 727,699.59 × 130,129.50
  4. Step 4: Simplify right side
    485,199.89x = 94,695,183,796.91
  5. Step 5: Solve for x
    x = 94,695,183,796.91/485,199.89
  6. Step 6: Final answer
    x = 195,167.36

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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.