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Finding the Fourth Proportional to 112,292.36, 154,963.14 and 61,991

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Solution

The fourth proportional to 112,292.36, 154,963.14 and 61,991 is: 85,547.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,292.36 : 154,963.14 = 61,991 : x
  2. Step 2: Convert to fraction form
    112,292.36/154,963.14 = 61,991/x
  3. Step 3: Cross multiply
    112,292.36x = 154,963.14 × 61,991
  4. Step 4: Simplify right side
    112,292.36x = 9,606,320,011.74
  5. Step 5: Solve for x
    x = 9,606,320,011.74/112,292.36
  6. Step 6: Final answer
    x = 85,547.41

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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.