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Finding the Fourth Proportional to 286,607.43, 429,912.18 and 86,929.56

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Solution

The fourth proportional to 286,607.43, 429,912.18 and 86,929.56 is: 130,394.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,607.43 : 429,912.18 = 86,929.56 : x
  2. Step 2: Convert to fraction form
    286,607.43/429,912.18 = 86,929.56/x
  3. Step 3: Cross multiply
    286,607.43x = 429,912.18 × 86,929.56
  4. Step 4: Simplify right side
    286,607.43x = 37,372,076,646.04
  5. Step 5: Solve for x
    x = 37,372,076,646.04/286,607.43
  6. Step 6: Final answer
    x = 130,394.65

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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.