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Finding the Fourth Proportional to 136,845,980.62, 188,696,079.03 and 87,207,670.78

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Solution

The fourth proportional to 136,845,980.62, 188,696,079.03 and 87,207,670.78 is: 120,250,119.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,845,980.62 : 188,696,079.03 = 87,207,670.78 : x
  2. Step 2: Convert to fraction form
    136,845,980.62/188,696,079.03 = 87,207,670.78/x
  3. Step 3: Cross multiply
    136,845,980.62x = 188,696,079.03 × 87,207,670.78
  4. Step 4: Simplify right side
    136,845,980.62x = 16,455,745,537,525,102
  5. Step 5: Solve for x
    x = 16,455,745,537,525,102/136,845,980.62
  6. Step 6: Final answer
    x = 120,250,119.61

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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.