Home / 142,304.09-196,371.95-78,637.77

Finding the Fourth Proportional to 142,304.09, 196,371.95 and 78,637.77

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Solution

The fourth proportional to 142,304.09, 196,371.95 and 78,637.77 is: 108,515.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,304.09 : 196,371.95 = 78,637.77 : x
  2. Step 2: Convert to fraction form
    142,304.09/196,371.95 = 78,637.77/x
  3. Step 3: Cross multiply
    142,304.09x = 196,371.95 × 78,637.77
  4. Step 4: Simplify right side
    142,304.09x = 15,442,251,845.36
  5. Step 5: Solve for x
    x = 15,442,251,845.36/142,304.09
  6. Step 6: Final answer
    x = 108,515.87

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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.