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Finding the Fourth Proportional to 111,126.72, 153,381.60 and 63,408

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Solution

The fourth proportional to 111,126.72, 153,381.60 and 63,408 is: 87,518.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,126.72 : 153,381.60 = 63,408 : x
  2. Step 2: Convert to fraction form
    111,126.72/153,381.60 = 63,408/x
  3. Step 3: Cross multiply
    111,126.72x = 153,381.60 × 63,408
  4. Step 4: Simplify right side
    111,126.72x = 9,725,620,492.80
  5. Step 5: Solve for x
    x = 9,725,620,492.80/111,126.72
  6. Step 6: Final answer
    x = 87,518.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.