Home / 143,051.56-197,411.28-79,389.40

Finding the Fourth Proportional to 143,051.56, 197,411.28 and 79,389.40

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Solution

The fourth proportional to 143,051.56, 197,411.28 and 79,389.40 is: 109,557.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,051.56 : 197,411.28 = 79,389.40 : x
  2. Step 2: Convert to fraction form
    143,051.56/197,411.28 = 79,389.40/x
  3. Step 3: Cross multiply
    143,051.56x = 197,411.28 × 79,389.40
  4. Step 4: Simplify right side
    143,051.56x = 15,672,363,072.43
  5. Step 5: Solve for x
    x = 15,672,363,072.43/143,051.56
  6. Step 6: Final answer
    x = 109,557.44

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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.