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Finding the Fourth Proportional to 140,555.34, 210,926.39 and 65,681.28

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Solution

The fourth proportional to 140,555.34, 210,926.39 and 65,681.28 is: 98,565.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,555.34 : 210,926.39 = 65,681.28 : x
  2. Step 2: Convert to fraction form
    140,555.34/210,926.39 = 65,681.28/x
  3. Step 3: Cross multiply
    140,555.34x = 210,926.39 × 65,681.28
  4. Step 4: Simplify right side
    140,555.34x = 13,853,914,952.57
  5. Step 5: Solve for x
    x = 13,853,914,952.57/140,555.34
  6. Step 6: Final answer
    x = 98,565.55

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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.