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Finding the Fourth Proportional to 102,938.43, 154,300.56 and 39,801.90

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Solution

The fourth proportional to 102,938.43, 154,300.56 and 39,801.90 is: 59,661.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,938.43 : 154,300.56 = 39,801.90 : x
  2. Step 2: Convert to fraction form
    102,938.43/154,300.56 = 39,801.90/x
  3. Step 3: Cross multiply
    102,938.43x = 154,300.56 × 39,801.90
  4. Step 4: Simplify right side
    102,938.43x = 6,141,455,459.06
  5. Step 5: Solve for x
    x = 6,141,455,459.06/102,938.43
  6. Step 6: Final answer
    x = 59,661.44

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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.