Home / 136,159.94-187,887.55-78,787.81

Finding the Fourth Proportional to 136,159.94, 187,887.55 and 78,787.81

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Solution

The fourth proportional to 136,159.94, 187,887.55 and 78,787.81 is: 108,719.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,159.94 : 187,887.55 = 78,787.81 : x
  2. Step 2: Convert to fraction form
    136,159.94/187,887.55 = 78,787.81/x
  3. Step 3: Cross multiply
    136,159.94x = 187,887.55 × 78,787.81
  4. Step 4: Simplify right side
    136,159.94x = 14,803,249,304.82
  5. Step 5: Solve for x
    x = 14,803,249,304.82/136,159.94
  6. Step 6: Final answer
    x = 108,719.57

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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.