Home / 128,921.08-177,908.32-71,557.06

Finding the Fourth Proportional to 128,921.08, 177,908.32 and 71,557.06

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Solution

The fourth proportional to 128,921.08, 177,908.32 and 71,557.06 is: 98,747.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,921.08 : 177,908.32 = 71,557.06 : x
  2. Step 2: Convert to fraction form
    128,921.08/177,908.32 = 71,557.06/x
  3. Step 3: Cross multiply
    128,921.08x = 177,908.32 × 71,557.06
  4. Step 4: Simplify right side
    128,921.08x = 12,730,596,328.74
  5. Step 5: Solve for x
    x = 12,730,596,328.74/128,921.08
  6. Step 6: Final answer
    x = 98,747.21

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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.