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Finding the Fourth Proportional to 40,968.51, 61,459.79 and 18,783.79

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Solution

The fourth proportional to 40,968.51, 61,459.79 and 18,783.79 is: 28,178.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,968.51 : 61,459.79 = 18,783.79 : x
  2. Step 2: Convert to fraction form
    40,968.51/61,459.79 = 18,783.79/x
  3. Step 3: Cross multiply
    40,968.51x = 61,459.79 × 18,783.79
  4. Step 4: Simplify right side
    40,968.51x = 1,154,447,387.59
  5. Step 5: Solve for x
    x = 1,154,447,387.59/40,968.51
  6. Step 6: Final answer
    x = 28,178.90

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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.