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Finding the Fourth Proportional to 279,075.30, 418,710.15 and 121,416.90

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Solution

The fourth proportional to 279,075.30, 418,710.15 and 121,416.90 is: 182,167.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,075.30 : 418,710.15 = 121,416.90 : x
  2. Step 2: Convert to fraction form
    279,075.30/418,710.15 = 121,416.90/x
  3. Step 3: Cross multiply
    279,075.30x = 418,710.15 × 121,416.90
  4. Step 4: Simplify right side
    279,075.30x = 50,838,488,411.54
  5. Step 5: Solve for x
    x = 50,838,488,411.54/279,075.30
  6. Step 6: Final answer
    x = 182,167.64

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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.