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Finding the Fourth Proportional to 172,916.72, 238,667.86 and 117,817.20

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Solution

The fourth proportional to 172,916.72, 238,667.86 and 117,817.20 is: 162,616.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,916.72 : 238,667.86 = 117,817.20 : x
  2. Step 2: Convert to fraction form
    172,916.72/238,667.86 = 117,817.20/x
  3. Step 3: Cross multiply
    172,916.72x = 238,667.86 × 117,817.20
  4. Step 4: Simplify right side
    172,916.72x = 28,119,178,430.32
  5. Step 5: Solve for x
    x = 28,119,178,430.32/172,916.72
  6. Step 6: Final answer
    x = 162,616.88

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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.