Home / 142,394.20-196,510.15-78,732

Finding the Fourth Proportional to 142,394.20, 196,510.15 and 78,732

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Solution

The fourth proportional to 142,394.20, 196,510.15 and 78,732 is: 108,653.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,394.20 : 196,510.15 = 78,732 : x
  2. Step 2: Convert to fraction form
    142,394.20/196,510.15 = 78,732/x
  3. Step 3: Cross multiply
    142,394.20x = 196,510.15 × 78,732
  4. Step 4: Simplify right side
    142,394.20x = 15,471,637,228.22
  5. Step 5: Solve for x
    x = 15,471,637,228.22/142,394.20
  6. Step 6: Final answer
    x = 108,653.56

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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.