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Finding the Fourth Proportional to 338,737.21, 508,106.03 and 86,036.65

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Solution

The fourth proportional to 338,737.21, 508,106.03 and 86,036.65 is: 129,055.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,737.21 : 508,106.03 = 86,036.65 : x
  2. Step 2: Convert to fraction form
    338,737.21/508,106.03 = 86,036.65/x
  3. Step 3: Cross multiply
    338,737.21x = 508,106.03 × 86,036.65
  4. Step 4: Simplify right side
    338,737.21x = 43,715,740,666.00
  5. Step 5: Solve for x
    x = 43,715,740,666.00/338,737.21
  6. Step 6: Final answer
    x = 129,055.03

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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.