Home / 136,012.59-187,643.64-78,641.43

Finding the Fourth Proportional to 136,012.59, 187,643.64 and 78,641.43

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Solution

The fourth proportional to 136,012.59, 187,643.64 and 78,641.43 is: 108,494.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,012.59 : 187,643.64 = 78,641.43 : x
  2. Step 2: Convert to fraction form
    136,012.59/187,643.64 = 78,641.43/x
  3. Step 3: Cross multiply
    136,012.59x = 187,643.64 × 78,641.43
  4. Step 4: Simplify right side
    136,012.59x = 14,756,564,180.01
  5. Step 5: Solve for x
    x = 14,756,564,180.01/136,012.59
  6. Step 6: Final answer
    x = 108,494.10

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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.