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Finding the Fourth Proportional to 221,978.20, 306,320.88 and 126,476.80

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Solution

The fourth proportional to 221,978.20, 306,320.88 and 126,476.80 is: 174,532.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,978.20 : 306,320.88 = 126,476.80 : x
  2. Step 2: Convert to fraction form
    221,978.20/306,320.88 = 126,476.80/x
  3. Step 3: Cross multiply
    221,978.20x = 306,320.88 × 126,476.80
  4. Step 4: Simplify right side
    221,978.20x = 38,742,484,675.58
  5. Step 5: Solve for x
    x = 38,742,484,675.58/221,978.20
  6. Step 6: Final answer
    x = 174,532.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.