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Finding the Fourth Proportional to 255,643.20, 383,140.80 and 97,660.80

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Solution

The fourth proportional to 255,643.20, 383,140.80 and 97,660.80 is: 146,367.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,643.20 : 383,140.80 = 97,660.80 : x
  2. Step 2: Convert to fraction form
    255,643.20/383,140.80 = 97,660.80/x
  3. Step 3: Cross multiply
    255,643.20x = 383,140.80 × 97,660.80
  4. Step 4: Simplify right side
    255,643.20x = 37,417,837,040.64
  5. Step 5: Solve for x
    x = 37,417,837,040.64/255,643.20
  6. Step 6: Final answer
    x = 146,367.43

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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.