Home / 135,085.29-186,440.85-78,529.47

Finding the Fourth Proportional to 135,085.29, 186,440.85 and 78,529.47

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Solution

The fourth proportional to 135,085.29, 186,440.85 and 78,529.47 is: 108,384.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,085.29 : 186,440.85 = 78,529.47 : x
  2. Step 2: Convert to fraction form
    135,085.29/186,440.85 = 78,529.47/x
  3. Step 3: Cross multiply
    135,085.29x = 186,440.85 × 78,529.47
  4. Step 4: Simplify right side
    135,085.29x = 14,641,101,136.85
  5. Step 5: Solve for x
    x = 14,641,101,136.85/135,085.29
  6. Step 6: Final answer
    x = 108,384.13

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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.