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Finding the Fourth Proportional to 112,266, 154,871.19 and 78,345.63

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Solution

The fourth proportional to 112,266, 154,871.19 and 78,345.63 is: 108,077.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,266 : 154,871.19 = 78,345.63 : x
  2. Step 2: Convert to fraction form
    112,266/154,871.19 = 78,345.63/x
  3. Step 3: Cross multiply
    112,266x = 154,871.19 × 78,345.63
  4. Step 4: Simplify right side
    112,266x = 12,133,480,949.40
  5. Step 5: Solve for x
    x = 12,133,480,949.40/112,266
  6. Step 6: Final answer
    x = 108,077.97

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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.