Home / 78,090.47-117,134.66-18,926.65

Finding the Fourth Proportional to 78,090.47, 117,134.66 and 18,926.65

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Solution

The fourth proportional to 78,090.47, 117,134.66 and 18,926.65 is: 28,389.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,090.47 : 117,134.66 = 18,926.65 : x
  2. Step 2: Convert to fraction form
    78,090.47/117,134.66 = 18,926.65/x
  3. Step 3: Cross multiply
    78,090.47x = 117,134.66 × 18,926.65
  4. Step 4: Simplify right side
    78,090.47x = 2,216,966,032.38
  5. Step 5: Solve for x
    x = 2,216,966,032.38/78,090.47
  6. Step 6: Final answer
    x = 28,389.71

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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.