Home / 259,864.08-389,763.72-72,890.16

Finding the Fourth Proportional to 259,864.08, 389,763.72 and 72,890.16

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Solution

The fourth proportional to 259,864.08, 389,763.72 and 72,890.16 is: 109,326.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,864.08 : 389,763.72 = 72,890.16 : x
  2. Step 2: Convert to fraction form
    259,864.08/389,763.72 = 72,890.16/x
  3. Step 3: Cross multiply
    259,864.08x = 389,763.72 × 72,890.16
  4. Step 4: Simplify right side
    259,864.08x = 28,409,939,913.00
  5. Step 5: Solve for x
    x = 28,409,939,913.00/259,864.08
  6. Step 6: Final answer
    x = 109,326.15

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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.