Home / 78,426.27-117,664.08-28,493.07

Finding the Fourth Proportional to 78,426.27, 117,664.08 and 28,493.07

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Solution

The fourth proportional to 78,426.27, 117,664.08 and 28,493.07 is: 42,748.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,426.27 : 117,664.08 = 28,493.07 : x
  2. Step 2: Convert to fraction form
    78,426.27/117,664.08 = 28,493.07/x
  3. Step 3: Cross multiply
    78,426.27x = 117,664.08 × 28,493.07
  4. Step 4: Simplify right side
    78,426.27x = 3,352,610,867.93
  5. Step 5: Solve for x
    x = 3,352,610,867.93/78,426.27
  6. Step 6: Final answer
    x = 42,748.57

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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.