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Finding the Third Proportional to 72,000 and 157,140

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Solution

The third proportional to 72,000 and 157,140 is: 342,958.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,000 : 157,140 = 157,140 : x
  2. Step 2: Convert to fraction form
    72,000/157,140 = 157,140/x
  3. Step 3: Cross multiply
    72,000x = 157,140 × 157,140
  4. Step 4: Simplify right side
    72,000x = 24,692,979,600
  5. Step 5: Solve for x
    x = 24,692,979,600/72,000
  6. Step 6: Final answer
    x = 342,958.05

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.