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Finding the Fourth Proportional to 136,364.51, 188,216.13 and 78,994.53

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Solution

The fourth proportional to 136,364.51, 188,216.13 and 78,994.53 is: 109,031.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,364.51 : 188,216.13 = 78,994.53 : x
  2. Step 2: Convert to fraction form
    136,364.51/188,216.13 = 78,994.53/x
  3. Step 3: Cross multiply
    136,364.51x = 188,216.13 × 78,994.53
  4. Step 4: Simplify right side
    136,364.51x = 14,868,044,727.77
  5. Step 5: Solve for x
    x = 14,868,044,727.77/136,364.51
  6. Step 6: Final answer
    x = 109,031.63

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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.