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Finding the Fourth Proportional to 99,709.80, 149,564.70 and 93,100.20

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Solution

The fourth proportional to 99,709.80, 149,564.70 and 93,100.20 is: 139,650.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,709.80 : 149,564.70 = 93,100.20 : x
  2. Step 2: Convert to fraction form
    99,709.80/149,564.70 = 93,100.20/x
  3. Step 3: Cross multiply
    99,709.80x = 149,564.70 × 93,100.20
  4. Step 4: Simplify right side
    99,709.80x = 13,924,503,482.94
  5. Step 5: Solve for x
    x = 13,924,503,482.94/99,709.80
  6. Step 6: Final answer
    x = 139,650.30

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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.