Home / 136,159.17-187,886.50-78,787.05

Finding the Fourth Proportional to 136,159.17, 187,886.50 and 78,787.05

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Solution

The fourth proportional to 136,159.17, 187,886.50 and 78,787.05 is: 108,718.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,159.17 : 187,886.50 = 78,787.05 : x
  2. Step 2: Convert to fraction form
    136,159.17/187,886.50 = 78,787.05/x
  3. Step 3: Cross multiply
    136,159.17x = 187,886.50 × 78,787.05
  4. Step 4: Simplify right side
    136,159.17x = 14,803,022,675.89
  5. Step 5: Solve for x
    x = 14,803,022,675.89/136,159.17
  6. Step 6: Final answer
    x = 108,718.51

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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.