Home / 128,913.37-177,911.16-71,558.08

Finding the Fourth Proportional to 128,913.37, 177,911.16 and 71,558.08

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Solution

The fourth proportional to 128,913.37, 177,911.16 and 71,558.08 is: 98,756.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,913.37 : 177,911.16 = 71,558.08 : x
  2. Step 2: Convert to fraction form
    128,913.37/177,911.16 = 71,558.08/x
  3. Step 3: Cross multiply
    128,913.37x = 177,911.16 × 71,558.08
  4. Step 4: Simplify right side
    128,913.37x = 12,730,981,020.17
  5. Step 5: Solve for x
    x = 12,730,981,020.17/128,913.37
  6. Step 6: Final answer
    x = 98,756.10

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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.