Home / 78,871.44-117,703.50-70,456.95

Finding the Fourth Proportional to 78,871.44, 117,703.50 and 70,456.95

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Solution

The fourth proportional to 78,871.44, 117,703.50 and 70,456.95 is: 105,146.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,871.44 : 117,703.50 = 70,456.95 : x
  2. Step 2: Convert to fraction form
    78,871.44/117,703.50 = 70,456.95/x
  3. Step 3: Cross multiply
    78,871.44x = 117,703.50 × 70,456.95
  4. Step 4: Simplify right side
    78,871.44x = 8,293,029,614.33
  5. Step 5: Solve for x
    x = 8,293,029,614.33/78,871.44
  6. Step 6: Final answer
    x = 105,146.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.