Home / 128,365.23-177,152.19-71,776.59

Finding the Fourth Proportional to 128,365.23, 177,152.19 and 71,776.59

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Solution

The fourth proportional to 128,365.23, 177,152.19 and 71,776.59 is: 99,056.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,365.23 : 177,152.19 = 71,776.59 : x
  2. Step 2: Convert to fraction form
    128,365.23/177,152.19 = 71,776.59/x
  3. Step 3: Cross multiply
    128,365.23x = 177,152.19 × 71,776.59
  4. Step 4: Simplify right side
    128,365.23x = 12,715,380,109.23
  5. Step 5: Solve for x
    x = 12,715,380,109.23/128,365.23
  6. Step 6: Final answer
    x = 99,056.26

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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.