Home / 128,735.75-177,666.27-72,158.06

Finding the Fourth Proportional to 128,735.75, 177,666.27 and 72,158.06

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Solution

The fourth proportional to 128,735.75, 177,666.27 and 72,158.06 is: 99,584.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,735.75 : 177,666.27 = 72,158.06 : x
  2. Step 2: Convert to fraction form
    128,735.75/177,666.27 = 72,158.06/x
  3. Step 3: Cross multiply
    128,735.75x = 177,666.27 × 72,158.06
  4. Step 4: Simplify right side
    128,735.75x = 12,820,053,370.64
  5. Step 5: Solve for x
    x = 12,820,053,370.64/128,735.75
  6. Step 6: Final answer
    x = 99,584.25

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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.