Home / 280,931,959.88-420,558,359.72-169,931,709.68

Finding the Fourth Proportional to 280,931,959.88, 420,558,359.72 and 169,931,709.68

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Solution

The fourth proportional to 280,931,959.88, 420,558,359.72 and 169,931,709.68 is: 254,389,714.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,931,959.88 : 420,558,359.72 = 169,931,709.68 : x
  2. Step 2: Convert to fraction form
    280,931,959.88/420,558,359.72 = 169,931,709.68/x
  3. Step 3: Cross multiply
    280,931,959.88x = 420,558,359.72 × 169,931,709.68
  4. Step 4: Simplify right side
    280,931,959.88x = 71,466,201,087,436,056
  5. Step 5: Solve for x
    x = 71,466,201,087,436,056/280,931,959.88
  6. Step 6: Final answer
    x = 254,389,714.57

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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.