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Finding the Fourth Proportional to 172,938.78, 238,659.12 and 97,487.28

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Solution

The fourth proportional to 172,938.78, 238,659.12 and 97,487.28 is: 134,534.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,938.78 : 238,659.12 = 97,487.28 : x
  2. Step 2: Convert to fraction form
    172,938.78/238,659.12 = 97,487.28/x
  3. Step 3: Cross multiply
    172,938.78x = 238,659.12 × 97,487.28
  4. Step 4: Simplify right side
    172,938.78x = 23,266,228,455.99
  5. Step 5: Solve for x
    x = 23,266,228,455.99/172,938.78
  6. Step 6: Final answer
    x = 134,534.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.