Home / 142,039.02-196,013.62-78,376.78

Finding the Fourth Proportional to 142,039.02, 196,013.62 and 78,376.78

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Solution

The fourth proportional to 142,039.02, 196,013.62 and 78,376.78 is: 108,159.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,039.02 : 196,013.62 = 78,376.78 : x
  2. Step 2: Convert to fraction form
    142,039.02/196,013.62 = 78,376.78/x
  3. Step 3: Cross multiply
    142,039.02x = 196,013.62 × 78,376.78
  4. Step 4: Simplify right side
    142,039.02x = 15,362,916,371.74
  5. Step 5: Solve for x
    x = 15,362,916,371.74/142,039.02
  6. Step 6: Final answer
    x = 108,159.83

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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.