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Finding the Fourth Proportional to 172,855, 238,539.90 and 97,406.20

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Solution

The fourth proportional to 172,855, 238,539.90 and 97,406.20 is: 134,420.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,855 : 238,539.90 = 97,406.20 : x
  2. Step 2: Convert to fraction form
    172,855/238,539.90 = 97,406.20/x
  3. Step 3: Cross multiply
    172,855x = 238,539.90 × 97,406.20
  4. Step 4: Simplify right side
    172,855x = 23,235,265,207.38
  5. Step 5: Solve for x
    x = 23,235,265,207.38/172,855
  6. Step 6: Final answer
    x = 134,420.56

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1.5x scale

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.