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Finding the Fourth Proportional to 96,434.40, 145,040.40 and 86,325.60

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Solution

The fourth proportional to 96,434.40, 145,040.40 and 86,325.60 is: 129,836.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,434.40 : 145,040.40 = 86,325.60 : x
  2. Step 2: Convert to fraction form
    96,434.40/145,040.40 = 86,325.60/x
  3. Step 3: Cross multiply
    96,434.40x = 145,040.40 × 86,325.60
  4. Step 4: Simplify right side
    96,434.40x = 12,520,699,554.24
  5. Step 5: Solve for x
    x = 12,520,699,554.24/96,434.40
  6. Step 6: Final answer
    x = 129,836.44

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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.