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Finding the Fourth Proportional to 305,671.34, 458,359.54 and 128,130.68

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Solution

The fourth proportional to 305,671.34, 458,359.54 and 128,130.68 is: 192,134.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,671.34 : 458,359.54 = 128,130.68 : x
  2. Step 2: Convert to fraction form
    305,671.34/458,359.54 = 128,130.68/x
  3. Step 3: Cross multiply
    305,671.34x = 458,359.54 × 128,130.68
  4. Step 4: Simplify right side
    305,671.34x = 58,729,919,544.69
  5. Step 5: Solve for x
    x = 58,729,919,544.69/305,671.34
  6. Step 6: Final answer
    x = 192,134.20

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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.