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Finding the Fourth Proportional to 115,090.56, 172,635.84 and 65,808

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Solution

The fourth proportional to 115,090.56, 172,635.84 and 65,808 is: 98,712

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,090.56 : 172,635.84 = 65,808 : x
  2. Step 2: Convert to fraction form
    115,090.56/172,635.84 = 65,808/x
  3. Step 3: Cross multiply
    115,090.56x = 172,635.84 × 65,808
  4. Step 4: Simplify right side
    115,090.56x = 11,360,819,358.72
  5. Step 5: Solve for x
    x = 11,360,819,358.72/115,090.56
  6. Step 6: Final answer
    x = 98,712

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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.