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Finding the Fourth Proportional to 138,090.99, 207,052.65 and 90,095.25

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Solution

The fourth proportional to 138,090.99, 207,052.65 and 90,095.25 is: 135,088.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,090.99 : 207,052.65 = 90,095.25 : x
  2. Step 2: Convert to fraction form
    138,090.99/207,052.65 = 90,095.25/x
  3. Step 3: Cross multiply
    138,090.99x = 207,052.65 × 90,095.25
  4. Step 4: Simplify right side
    138,090.99x = 18,654,460,264.91
  5. Step 5: Solve for x
    x = 18,654,460,264.91/138,090.99
  6. Step 6: Final answer
    x = 135,088.18

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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.