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Finding the Fourth Proportional to 207,397.20, 310,913.40 and 122,949.20

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Solution

The fourth proportional to 207,397.20, 310,913.40 and 122,949.20 is: 184,315.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,397.20 : 310,913.40 = 122,949.20 : x
  2. Step 2: Convert to fraction form
    207,397.20/310,913.40 = 122,949.20/x
  3. Step 3: Cross multiply
    207,397.20x = 310,913.40 × 122,949.20
  4. Step 4: Simplify right side
    207,397.20x = 38,226,553,799.28
  5. Step 5: Solve for x
    x = 38,226,553,799.28/207,397.20
  6. Step 6: Final answer
    x = 184,315.67

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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.