Home / 128,498.04-177,327.66-71,905.08

Finding the Fourth Proportional to 128,498.04, 177,327.66 and 71,905.08

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Solution

The fourth proportional to 128,498.04, 177,327.66 and 71,905.08 is: 99,229.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,498.04 : 177,327.66 = 71,905.08 : x
  2. Step 2: Convert to fraction form
    128,498.04/177,327.66 = 71,905.08/x
  3. Step 3: Cross multiply
    128,498.04x = 177,327.66 × 71,905.08
  4. Step 4: Simplify right side
    128,498.04x = 12,750,759,578.51
  5. Step 5: Solve for x
    x = 12,750,759,578.51/128,498.04
  6. Step 6: Final answer
    x = 99,229.21

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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.