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Finding the Fourth Proportional to 380,018.20, 570,027.30 and 99,563.80

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Solution

The fourth proportional to 380,018.20, 570,027.30 and 99,563.80 is: 149,345.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,018.20 : 570,027.30 = 99,563.80 : x
  2. Step 2: Convert to fraction form
    380,018.20/570,027.30 = 99,563.80/x
  3. Step 3: Cross multiply
    380,018.20x = 570,027.30 × 99,563.80
  4. Step 4: Simplify right side
    380,018.20x = 56,754,084,091.74
  5. Step 5: Solve for x
    x = 56,754,084,091.74/380,018.20
  6. Step 6: Final answer
    x = 149,345.70

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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.