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Finding the Fourth Proportional to 210,907.80, 291,056.94 and 115,414.20

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Solution

The fourth proportional to 210,907.80, 291,056.94 and 115,414.20 is: 159,273.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,907.80 : 291,056.94 = 115,414.20 : x
  2. Step 2: Convert to fraction form
    210,907.80/291,056.94 = 115,414.20/x
  3. Step 3: Cross multiply
    210,907.80x = 291,056.94 × 115,414.20
  4. Step 4: Simplify right side
    210,907.80x = 33,592,103,884.55
  5. Step 5: Solve for x
    x = 33,592,103,884.55/210,907.80
  6. Step 6: Final answer
    x = 159,273.88

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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.