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Finding the Fourth Proportional to 172,911.51, 238,617.43 and 96,430.70

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Solution

The fourth proportional to 172,911.51, 238,617.43 and 96,430.70 is: 133,074.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,911.51 : 238,617.43 = 96,430.70 : x
  2. Step 2: Convert to fraction form
    172,911.51/238,617.43 = 96,430.70/x
  3. Step 3: Cross multiply
    172,911.51x = 238,617.43 × 96,430.70
  4. Step 4: Simplify right side
    172,911.51x = 23,010,046,162.57
  5. Step 5: Solve for x
    x = 23,010,046,162.57/172,911.51
  6. Step 6: Final answer
    x = 133,074.11

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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.