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Finding the Fourth Proportional to 243,125.88, 364,851.68 and 85,354.80

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Solution

The fourth proportional to 243,125.88, 364,851.68 and 85,354.80 is: 128,089.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,125.88 : 364,851.68 = 85,354.80 : x
  2. Step 2: Convert to fraction form
    243,125.88/364,851.68 = 85,354.80/x
  3. Step 3: Cross multiply
    243,125.88x = 364,851.68 × 85,354.80
  4. Step 4: Simplify right side
    243,125.88x = 31,141,842,176.06
  5. Step 5: Solve for x
    x = 31,141,842,176.06/243,125.88
  6. Step 6: Final answer
    x = 128,089.38

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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.