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Finding the Fourth Proportional to 154,489.86, 213,079.95 and 103,560.03

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Solution

The fourth proportional to 154,489.86, 213,079.95 and 103,560.03 is: 142,835.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,489.86 : 213,079.95 = 103,560.03 : x
  2. Step 2: Convert to fraction form
    154,489.86/213,079.95 = 103,560.03/x
  3. Step 3: Cross multiply
    154,489.86x = 213,079.95 × 103,560.03
  4. Step 4: Simplify right side
    154,489.86x = 22,066,566,014.40
  5. Step 5: Solve for x
    x = 22,066,566,014.40/154,489.86
  6. Step 6: Final answer
    x = 142,835.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.