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Finding the Fourth Proportional to 345,447.76, 518,171.65 and 134,938.07

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Solution

The fourth proportional to 345,447.76, 518,171.65 and 134,938.07 is: 202,407.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,447.76 : 518,171.65 = 134,938.07 : x
  2. Step 2: Convert to fraction form
    345,447.76/518,171.65 = 134,938.07/x
  3. Step 3: Cross multiply
    345,447.76x = 518,171.65 × 134,938.07
  4. Step 4: Simplify right side
    345,447.76x = 69,921,083,337.80
  5. Step 5: Solve for x
    x = 69,921,083,337.80/345,447.76
  6. Step 6: Final answer
    x = 202,407.11

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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.