Home / 142,809.84-197,076.35-78,282.66

Finding the Fourth Proportional to 142,809.84, 197,076.35 and 78,282.66

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Solution

The fourth proportional to 142,809.84, 197,076.35 and 78,282.66 is: 108,029.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,809.84 : 197,076.35 = 78,282.66 : x
  2. Step 2: Convert to fraction form
    142,809.84/197,076.35 = 78,282.66/x
  3. Step 3: Cross multiply
    142,809.84x = 197,076.35 × 78,282.66
  4. Step 4: Simplify right side
    142,809.84x = 15,427,660,901.09
  5. Step 5: Solve for x
    x = 15,427,660,901.09/142,809.84
  6. Step 6: Final answer
    x = 108,029.40

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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.