Home / 142,807.08-197,072.57-78,279.92

Finding the Fourth Proportional to 142,807.08, 197,072.57 and 78,279.92

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Solution

The fourth proportional to 142,807.08, 197,072.57 and 78,279.92 is: 108,025.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,807.08 : 197,072.57 = 78,279.92 : x
  2. Step 2: Convert to fraction form
    142,807.08/197,072.57 = 78,279.92/x
  3. Step 3: Cross multiply
    142,807.08x = 197,072.57 × 78,279.92
  4. Step 4: Simplify right side
    142,807.08x = 15,426,823,637.03
  5. Step 5: Solve for x
    x = 15,426,823,637.03/142,807.08
  6. Step 6: Final answer
    x = 108,025.62

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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.