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Finding the Fourth Proportional to 338,783.16, 508,172.35 and 86,064.38

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Solution

The fourth proportional to 338,783.16, 508,172.35 and 86,064.38 is: 129,095.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,783.16 : 508,172.35 = 86,064.38 : x
  2. Step 2: Convert to fraction form
    338,783.16/508,172.35 = 86,064.38/x
  3. Step 3: Cross multiply
    338,783.16x = 508,172.35 × 86,064.38
  4. Step 4: Simplify right side
    338,783.16x = 43,735,538,235.89
  5. Step 5: Solve for x
    x = 43,735,538,235.89/338,783.16
  6. Step 6: Final answer
    x = 129,095.96

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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.