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Finding the Third Proportional to 72,128 and 155,776

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Solution

The third proportional to 72,128 and 155,776 is: 336,431.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,128 : 155,776 = 155,776 : x
  2. Step 2: Convert to fraction form
    72,128/155,776 = 155,776/x
  3. Step 3: Cross multiply
    72,128x = 155,776 × 155,776
  4. Step 4: Simplify right side
    72,128x = 24,266,162,176
  5. Step 5: Solve for x
    x = 24,266,162,176/72,128
  6. Step 6: Final answer
    x = 336,431.93

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.