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Finding the Fourth Proportional to 243,019.80, 364,529.70 and 138,043.80

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Solution

The fourth proportional to 243,019.80, 364,529.70 and 138,043.80 is: 207,065.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,019.80 : 364,529.70 = 138,043.80 : x
  2. Step 2: Convert to fraction form
    243,019.80/364,529.70 = 138,043.80/x
  3. Step 3: Cross multiply
    243,019.80x = 364,529.70 × 138,043.80
  4. Step 4: Simplify right side
    243,019.80x = 50,321,065,000.86
  5. Step 5: Solve for x
    x = 50,321,065,000.86/243,019.80
  6. Step 6: Final answer
    x = 207,065.70

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1.5x scale

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.