Home / 135,378.18-186,841.44-78,006.51

Finding the Fourth Proportional to 135,378.18, 186,841.44 and 78,006.51

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Solution

The fourth proportional to 135,378.18, 186,841.44 and 78,006.51 is: 107,660.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,378.18 : 186,841.44 = 78,006.51 : x
  2. Step 2: Convert to fraction form
    135,378.18/186,841.44 = 78,006.51/x
  3. Step 3: Cross multiply
    135,378.18x = 186,841.44 × 78,006.51
  4. Step 4: Simplify right side
    135,378.18x = 14,574,848,657.77
  5. Step 5: Solve for x
    x = 14,574,848,657.77/135,378.18
  6. Step 6: Final answer
    x = 107,660.25

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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.