Home / 128,741.38-177,673.56-71,386.40

Finding the Fourth Proportional to 128,741.38, 177,673.56 and 71,386.40

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Solution

The fourth proportional to 128,741.38, 177,673.56 and 71,386.40 is: 98,519.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,741.38 : 177,673.56 = 71,386.40 : x
  2. Step 2: Convert to fraction form
    128,741.38/177,673.56 = 71,386.40/x
  3. Step 3: Cross multiply
    128,741.38x = 177,673.56 × 71,386.40
  4. Step 4: Simplify right side
    128,741.38x = 12,683,475,823.58
  5. Step 5: Solve for x
    x = 12,683,475,823.58/128,741.38
  6. Step 6: Final answer
    x = 98,519.03

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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.