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Finding the Fourth Proportional to 139,172.32, 191,792.64 and 136,613.20

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Solution

The fourth proportional to 139,172.32, 191,792.64 and 136,613.20 is: 188,265.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,172.32 : 191,792.64 = 136,613.20 : x
  2. Step 2: Convert to fraction form
    139,172.32/191,792.64 = 136,613.20/x
  3. Step 3: Cross multiply
    139,172.32x = 191,792.64 × 136,613.20
  4. Step 4: Simplify right side
    139,172.32x = 26,201,406,286.85
  5. Step 5: Solve for x
    x = 26,201,406,286.85/139,172.32
  6. Step 6: Final answer
    x = 188,265.93

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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.