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Finding the Fourth Proportional to 136,055.60, 187,741.80 and 78,696.06

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Solution

The fourth proportional to 136,055.60, 187,741.80 and 78,696.06 is: 108,591.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,055.60 : 187,741.80 = 78,696.06 : x
  2. Step 2: Convert to fraction form
    136,055.60/187,741.80 = 78,696.06/x
  3. Step 3: Cross multiply
    136,055.60x = 187,741.80 × 78,696.06
  4. Step 4: Simplify right side
    136,055.60x = 14,774,539,253.28
  5. Step 5: Solve for x
    x = 14,774,539,253.28/136,055.60
  6. Step 6: Final answer
    x = 108,591.92

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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.