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Finding the Fourth Proportional to 138,090.58, 206,992.23 and 93,720.94

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Solution

The fourth proportional to 138,090.58, 206,992.23 and 93,720.94 is: 140,483.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,090.58 : 206,992.23 = 93,720.94 : x
  2. Step 2: Convert to fraction form
    138,090.58/206,992.23 = 93,720.94/x
  3. Step 3: Cross multiply
    138,090.58x = 206,992.23 × 93,720.94
  4. Step 4: Simplify right side
    138,090.58x = 19,399,506,368.30
  5. Step 5: Solve for x
    x = 19,399,506,368.30/138,090.58
  6. Step 6: Final answer
    x = 140,483.92

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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.