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Finding the Fourth Proportional to 145,137.94, 217,502.76 and 115,423.90

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Solution

The fourth proportional to 145,137.94, 217,502.76 and 115,423.90 is: 172,973.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,137.94 : 217,502.76 = 115,423.90 : x
  2. Step 2: Convert to fraction form
    145,137.94/217,502.76 = 115,423.90/x
  3. Step 3: Cross multiply
    145,137.94x = 217,502.76 × 115,423.90
  4. Step 4: Simplify right side
    145,137.94x = 25,105,016,819.96
  5. Step 5: Solve for x
    x = 25,105,016,819.96/145,137.94
  6. Step 6: Final answer
    x = 172,973.50

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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.