Home / 128,541.56-177,352.48-78,204.92

Finding the Fourth Proportional to 128,541.56, 177,352.48 and 78,204.92

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Solution

The fourth proportional to 128,541.56, 177,352.48 and 78,204.92 is: 107,901.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,541.56 : 177,352.48 = 78,204.92 : x
  2. Step 2: Convert to fraction form
    128,541.56/177,352.48 = 78,204.92/x
  3. Step 3: Cross multiply
    128,541.56x = 177,352.48 × 78,204.92
  4. Step 4: Simplify right side
    128,541.56x = 13,869,836,510.20
  5. Step 5: Solve for x
    x = 13,869,836,510.20/128,541.56
  6. Step 6: Final answer
    x = 107,901.57

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1.5x scale

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.