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Finding the Fourth Proportional to 243,021.80, 364,532.70 and 138,045.80

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Solution

The fourth proportional to 243,021.80, 364,532.70 and 138,045.80 is: 207,068.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,021.80 : 364,532.70 = 138,045.80 : x
  2. Step 2: Convert to fraction form
    243,021.80/364,532.70 = 138,045.80/x
  3. Step 3: Cross multiply
    243,021.80x = 364,532.70 × 138,045.80
  4. Step 4: Simplify right side
    243,021.80x = 50,322,208,197.66
  5. Step 5: Solve for x
    x = 50,322,208,197.66/243,021.80
  6. Step 6: Final answer
    x = 207,068.70

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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.