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Finding the Fourth Proportional to 220,920.90, 304,859.98 and 125,415.06

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Solution

The fourth proportional to 220,920.90, 304,859.98 and 125,415.06 is: 173,066.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,920.90 : 304,859.98 = 125,415.06 : x
  2. Step 2: Convert to fraction form
    220,920.90/304,859.98 = 125,415.06/x
  3. Step 3: Cross multiply
    220,920.90x = 304,859.98 × 125,415.06
  4. Step 4: Simplify right side
    220,920.90x = 38,234,032,683.30
  5. Step 5: Solve for x
    x = 38,234,032,683.30/220,920.90
  6. Step 6: Final answer
    x = 173,066.62

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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.