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Finding the Fourth Proportional to 99,219.80, 148,829.70 and 25,347.80

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Solution

The fourth proportional to 99,219.80, 148,829.70 and 25,347.80 is: 38,021.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,219.80 : 148,829.70 = 25,347.80 : x
  2. Step 2: Convert to fraction form
    99,219.80/148,829.70 = 25,347.80/x
  3. Step 3: Cross multiply
    99,219.80x = 148,829.70 × 25,347.80
  4. Step 4: Simplify right side
    99,219.80x = 3,772,505,469.66
  5. Step 5: Solve for x
    x = 3,772,505,469.66/99,219.80
  6. Step 6: Final answer
    x = 38,021.70

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1.5x scale

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.