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Finding the Fourth Proportional to 521,063.20, 781,521.90 and 166,113.10

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Solution

The fourth proportional to 521,063.20, 781,521.90 and 166,113.10 is: 249,146.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,063.20 : 781,521.90 = 166,113.10 : x
  2. Step 2: Convert to fraction form
    521,063.20/781,521.90 = 166,113.10/x
  3. Step 3: Cross multiply
    521,063.20x = 781,521.90 × 166,113.10
  4. Step 4: Simplify right side
    521,063.20x = 129,821,025,526.89
  5. Step 5: Solve for x
    x = 129,821,025,526.89/521,063.20
  6. Step 6: Final answer
    x = 249,146.41

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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.