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Finding the Fourth Proportional to 109,266.60, 150,830.28 and 85,401.03

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Solution

The fourth proportional to 109,266.60, 150,830.28 and 85,401.03 is: 117,886.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,266.60 : 150,830.28 = 85,401.03 : x
  2. Step 2: Convert to fraction form
    109,266.60/150,830.28 = 85,401.03/x
  3. Step 3: Cross multiply
    109,266.60x = 150,830.28 × 85,401.03
  4. Step 4: Simplify right side
    109,266.60x = 12,881,061,267.19
  5. Step 5: Solve for x
    x = 12,881,061,267.19/109,266.60
  6. Step 6: Final answer
    x = 117,886.54

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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.