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Finding the Fourth Proportional to 99,453.80, 148,748.70 and 88,999.40

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Solution

The fourth proportional to 99,453.80, 148,748.70 and 88,999.40 is: 133,112.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,453.80 : 148,748.70 = 88,999.40 : x
  2. Step 2: Convert to fraction form
    99,453.80/148,748.70 = 88,999.40/x
  3. Step 3: Cross multiply
    99,453.80x = 148,748.70 × 88,999.40
  4. Step 4: Simplify right side
    99,453.80x = 13,238,545,050.78
  5. Step 5: Solve for x
    x = 13,238,545,050.78/99,453.80
  6. Step 6: Final answer
    x = 133,112.51

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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.