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Finding the Fourth Proportional to 136,681.70, 188,340.81 and 100,814.90

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Solution

The fourth proportional to 136,681.70, 188,340.81 and 100,814.90 is: 138,918.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,681.70 : 188,340.81 = 100,814.90 : x
  2. Step 2: Convert to fraction form
    136,681.70/188,340.81 = 100,814.90/x
  3. Step 3: Cross multiply
    136,681.70x = 188,340.81 × 100,814.90
  4. Step 4: Simplify right side
    136,681.70x = 18,987,559,926.07
  5. Step 5: Solve for x
    x = 18,987,559,926.07/136,681.70
  6. Step 6: Final answer
    x = 138,918.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.