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Finding the Fourth Proportional to 136,297.68, 204,378.78 and 86,339.93

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Solution

The fourth proportional to 136,297.68, 204,378.78 and 86,339.93 is: 129,466.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,297.68 : 204,378.78 = 86,339.93 : x
  2. Step 2: Convert to fraction form
    136,297.68/204,378.78 = 86,339.93/x
  3. Step 3: Cross multiply
    136,297.68x = 204,378.78 × 86,339.93
  4. Step 4: Simplify right side
    136,297.68x = 17,646,048,536.79
  5. Step 5: Solve for x
    x = 17,646,048,536.79/136,297.68
  6. Step 6: Final answer
    x = 129,466.98

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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.