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Finding the Fourth Proportional to 102,497.40, 153,679.28 and 91,999.80

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Solution

The fourth proportional to 102,497.40, 153,679.28 and 91,999.80 is: 137,939.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,497.40 : 153,679.28 = 91,999.80 : x
  2. Step 2: Convert to fraction form
    102,497.40/153,679.28 = 91,999.80/x
  3. Step 3: Cross multiply
    102,497.40x = 153,679.28 × 91,999.80
  4. Step 4: Simplify right side
    102,497.40x = 14,138,462,564.15
  5. Step 5: Solve for x
    x = 14,138,462,564.15/102,497.40
  6. Step 6: Final answer
    x = 137,939.72

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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.