Home / 143,428.47-197,925.17-78,893.61

Finding the Fourth Proportional to 143,428.47, 197,925.17 and 78,893.61

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Solution

The fourth proportional to 143,428.47, 197,925.17 and 78,893.61 is: 108,869.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,428.47 : 197,925.17 = 78,893.61 : x
  2. Step 2: Convert to fraction form
    143,428.47/197,925.17 = 78,893.61/x
  3. Step 3: Cross multiply
    143,428.47x = 197,925.17 × 78,893.61
  4. Step 4: Simplify right side
    143,428.47x = 15,615,032,009.08
  5. Step 5: Solve for x
    x = 15,615,032,009.08/143,428.47
  6. Step 6: Final answer
    x = 108,869.82

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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.