Home / 280,008.07-420,011.30-69,646.01

Finding the Fourth Proportional to 280,008.07, 420,011.30 and 69,646.01

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Solution

The fourth proportional to 280,008.07, 420,011.30 and 69,646.01 is: 104,468.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,008.07 : 420,011.30 = 69,646.01 : x
  2. Step 2: Convert to fraction form
    280,008.07/420,011.30 = 69,646.01/x
  3. Step 3: Cross multiply
    280,008.07x = 420,011.30 × 69,646.01
  4. Step 4: Simplify right side
    280,008.07x = 29,252,109,273.97
  5. Step 5: Solve for x
    x = 29,252,109,273.97/280,008.07
  6. Step 6: Final answer
    x = 104,468.81

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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.