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Finding the Fourth Proportional to 115,491.78, 173,013.30 and 65,417.58

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Solution

The fourth proportional to 115,491.78, 173,013.30 and 65,417.58 is: 97,999.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,491.78 : 173,013.30 = 65,417.58 : x
  2. Step 2: Convert to fraction form
    115,491.78/173,013.30 = 65,417.58/x
  3. Step 3: Cross multiply
    115,491.78x = 173,013.30 × 65,417.58
  4. Step 4: Simplify right side
    115,491.78x = 11,318,111,393.81
  5. Step 5: Solve for x
    x = 11,318,111,393.81/115,491.78
  6. Step 6: Final answer
    x = 97,999.28

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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.