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Finding the Fourth Proportional to 115,004.70, 172,515.15 and 65,108.70

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Solution

The fourth proportional to 115,004.70, 172,515.15 and 65,108.70 is: 97,667.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,004.70 : 172,515.15 = 65,108.70 : x
  2. Step 2: Convert to fraction form
    115,004.70/172,515.15 = 65,108.70/x
  3. Step 3: Cross multiply
    115,004.70x = 172,515.15 × 65,108.70
  4. Step 4: Simplify right side
    115,004.70x = 11,232,237,146.81
  5. Step 5: Solve for x
    x = 11,232,237,146.81/115,004.70
  6. Step 6: Final answer
    x = 97,667.64

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1.5x scale

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.