Home / 128,670.81-177,563.18-71,308.94

Finding the Fourth Proportional to 128,670.81, 177,563.18 and 71,308.94

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Solution

The fourth proportional to 128,670.81, 177,563.18 and 71,308.94 is: 98,404.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,670.81 : 177,563.18 = 71,308.94 : x
  2. Step 2: Convert to fraction form
    128,670.81/177,563.18 = 71,308.94/x
  3. Step 3: Cross multiply
    128,670.81x = 177,563.18 × 71,308.94
  4. Step 4: Simplify right side
    128,670.81x = 12,661,840,904.47
  5. Step 5: Solve for x
    x = 12,661,840,904.47/128,670.81
  6. Step 6: Final answer
    x = 98,404.92

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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.