Home / 142,929.70-197,255.10-79,288

Finding the Fourth Proportional to 142,929.70, 197,255.10 and 79,288

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Solution

The fourth proportional to 142,929.70, 197,255.10 and 79,288 is: 109,424.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,929.70 : 197,255.10 = 79,288 : x
  2. Step 2: Convert to fraction form
    142,929.70/197,255.10 = 79,288/x
  3. Step 3: Cross multiply
    142,929.70x = 197,255.10 × 79,288
  4. Step 4: Simplify right side
    142,929.70x = 15,639,962,368.80
  5. Step 5: Solve for x
    x = 15,639,962,368.80/142,929.70
  6. Step 6: Final answer
    x = 109,424.16

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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.