Home / 218,690.48-328,035-68,943.86

Finding the Fourth Proportional to 218,690.48, 328,035 and 68,943.86

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Solution

The fourth proportional to 218,690.48, 328,035 and 68,943.86 is: 103,415.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,690.48 : 328,035 = 68,943.86 : x
  2. Step 2: Convert to fraction form
    218,690.48/328,035 = 68,943.86/x
  3. Step 3: Cross multiply
    218,690.48x = 328,035 × 68,943.86
  4. Step 4: Simplify right side
    218,690.48x = 22,615,999,115.10
  5. Step 5: Solve for x
    x = 22,615,999,115.10/218,690.48
  6. Step 6: Final answer
    x = 103,415.56

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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.