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Finding the Fourth Proportional to 135,988.04, 203,686.68 and 65,720

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Solution

The fourth proportional to 135,988.04, 203,686.68 and 65,720 is: 98,437.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,988.04 : 203,686.68 = 65,720 : x
  2. Step 2: Convert to fraction form
    135,988.04/203,686.68 = 65,720/x
  3. Step 3: Cross multiply
    135,988.04x = 203,686.68 × 65,720
  4. Step 4: Simplify right side
    135,988.04x = 13,386,288,609.60
  5. Step 5: Solve for x
    x = 13,386,288,609.60/135,988.04
  6. Step 6: Final answer
    x = 98,437.25

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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.