Home / 259,985.48-390,000.32-72,996.96

Finding the Fourth Proportional to 259,985.48, 390,000.32 and 72,996.96

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Solution

The fourth proportional to 259,985.48, 390,000.32 and 72,996.96 is: 109,501.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,985.48 : 390,000.32 = 72,996.96 : x
  2. Step 2: Convert to fraction form
    259,985.48/390,000.32 = 72,996.96/x
  3. Step 3: Cross multiply
    259,985.48x = 390,000.32 × 72,996.96
  4. Step 4: Simplify right side
    259,985.48x = 28,468,837,759.03
  5. Step 5: Solve for x
    x = 28,468,837,759.03/259,985.48
  6. Step 6: Final answer
    x = 109,501.65

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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.