Home / 135,302.40-186,717.96-78,715.80

Finding the Fourth Proportional to 135,302.40, 186,717.96 and 78,715.80

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Solution

The fourth proportional to 135,302.40, 186,717.96 and 78,715.80 is: 108,628.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,302.40 : 186,717.96 = 78,715.80 : x
  2. Step 2: Convert to fraction form
    135,302.40/186,717.96 = 78,715.80/x
  3. Step 3: Cross multiply
    135,302.40x = 186,717.96 × 78,715.80
  4. Step 4: Simplify right side
    135,302.40x = 14,697,653,595.77
  5. Step 5: Solve for x
    x = 14,697,653,595.77/135,302.40
  6. Step 6: Final answer
    x = 108,628.18

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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.