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Finding the Fourth Proportional to 145,220.40, 217,960.20 and 125,521.20

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Solution

The fourth proportional to 145,220.40, 217,960.20 and 125,521.20 is: 188,393.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,220.40 : 217,960.20 = 125,521.20 : x
  2. Step 2: Convert to fraction form
    145,220.40/217,960.20 = 125,521.20/x
  3. Step 3: Cross multiply
    145,220.40x = 217,960.20 × 125,521.20
  4. Step 4: Simplify right side
    145,220.40x = 27,358,625,856.24
  5. Step 5: Solve for x
    x = 27,358,625,856.24/145,220.40
  6. Step 6: Final answer
    x = 188,393.82

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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.