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Finding the Fourth Proportional to 72,144.36, 108,240.84 and 45,459.36

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Solution

The fourth proportional to 72,144.36, 108,240.84 and 45,459.36 is: 68,204.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144.36 : 108,240.84 = 45,459.36 : x
  2. Step 2: Convert to fraction form
    72,144.36/108,240.84 = 45,459.36/x
  3. Step 3: Cross multiply
    72,144.36x = 108,240.84 × 45,459.36
  4. Step 4: Simplify right side
    72,144.36x = 4,920,559,312.26
  5. Step 5: Solve for x
    x = 4,920,559,312.26/72,144.36
  6. Step 6: Final answer
    x = 68,204.35

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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.