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Finding the Fourth Proportional to 115,266.70, 172,908.15 and 65,370.70

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Solution

The fourth proportional to 115,266.70, 172,908.15 and 65,370.70 is: 98,060.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,266.70 : 172,908.15 = 65,370.70 : x
  2. Step 2: Convert to fraction form
    115,266.70/172,908.15 = 65,370.70/x
  3. Step 3: Cross multiply
    115,266.70x = 172,908.15 × 65,370.70
  4. Step 4: Simplify right side
    115,266.70x = 11,303,126,801.21
  5. Step 5: Solve for x
    x = 11,303,126,801.21/115,266.70
  6. Step 6: Final answer
    x = 98,060.64

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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.