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Finding the Fourth Proportional to 280,053.64, 420,080.56 and 69,691.58

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Solution

The fourth proportional to 280,053.64, 420,080.56 and 69,691.58 is: 104,537.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,053.64 : 420,080.56 = 69,691.58 : x
  2. Step 2: Convert to fraction form
    280,053.64/420,080.56 = 69,691.58/x
  3. Step 3: Cross multiply
    280,053.64x = 420,080.56 × 69,691.58
  4. Step 4: Simplify right side
    280,053.64x = 29,276,077,953.68
  5. Step 5: Solve for x
    x = 29,276,077,953.68/280,053.64
  6. Step 6: Final answer
    x = 104,537.39

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1.5x scale

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.