Home / 128,936.10-177,929.02-71,572.10

Finding the Fourth Proportional to 128,936.10, 177,929.02 and 71,572.10

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Solution

The fourth proportional to 128,936.10, 177,929.02 and 71,572.10 is: 98,767.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,936.10 : 177,929.02 = 71,572.10 : x
  2. Step 2: Convert to fraction form
    128,936.10/177,929.02 = 71,572.10/x
  3. Step 3: Cross multiply
    128,936.10x = 177,929.02 × 71,572.10
  4. Step 4: Simplify right side
    128,936.10x = 12,734,753,612.34
  5. Step 5: Solve for x
    x = 12,734,753,612.34/128,936.10
  6. Step 6: Final answer
    x = 98,767.94

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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.