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Finding the Fourth Proportional to 136,070.28, 187,764.28 and 78,700.41

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Solution

The fourth proportional to 136,070.28, 187,764.28 and 78,700.41 is: 108,599.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,070.28 : 187,764.28 = 78,700.41 : x
  2. Step 2: Convert to fraction form
    136,070.28/187,764.28 = 78,700.41/x
  3. Step 3: Cross multiply
    136,070.28x = 187,764.28 × 78,700.41
  4. Step 4: Simplify right side
    136,070.28x = 14,777,125,622.60
  5. Step 5: Solve for x
    x = 14,777,125,622.60/136,070.28
  6. Step 6: Final answer
    x = 108,599.22

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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.