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Finding the Fourth Proportional to 338,739.86, 508,109.98 and 86,039.30

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Solution

The fourth proportional to 338,739.86, 508,109.98 and 86,039.30 is: 129,059.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,739.86 : 508,109.98 = 86,039.30 : x
  2. Step 2: Convert to fraction form
    338,739.86/508,109.98 = 86,039.30/x
  3. Step 3: Cross multiply
    338,739.86x = 508,109.98 × 86,039.30
  4. Step 4: Simplify right side
    338,739.86x = 43,717,427,002.21
  5. Step 5: Solve for x
    x = 43,717,427,002.21/338,739.86
  6. Step 6: Final answer
    x = 129,059.00

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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.