Home / 142,436.63-196,545.53-78,765.77

Finding the Fourth Proportional to 142,436.63, 196,545.53 and 78,765.77

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Solution

The fourth proportional to 142,436.63, 196,545.53 and 78,765.77 is: 108,687.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,436.63 : 196,545.53 = 78,765.77 : x
  2. Step 2: Convert to fraction form
    142,436.63/196,545.53 = 78,765.77/x
  3. Step 3: Cross multiply
    142,436.63x = 196,545.53 × 78,765.77
  4. Step 4: Simplify right side
    142,436.63x = 15,481,058,633.95
  5. Step 5: Solve for x
    x = 15,481,058,633.95/142,436.63
  6. Step 6: Final answer
    x = 108,687.35

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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.