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Finding the Fourth Proportional to 172,572.60, 258,895.86 and 97,728.12

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Solution

The fourth proportional to 172,572.60, 258,895.86 and 97,728.12 is: 146,613.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,572.60 : 258,895.86 = 97,728.12 : x
  2. Step 2: Convert to fraction form
    172,572.60/258,895.86 = 97,728.12/x
  3. Step 3: Cross multiply
    172,572.60x = 258,895.86 × 97,728.12
  4. Step 4: Simplify right side
    172,572.60x = 25,301,405,673.58
  5. Step 5: Solve for x
    x = 25,301,405,673.58/172,572.60
  6. Step 6: Final answer
    x = 146,613.11

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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.