Home / 128,452.72-177,324.27-74,718.16

Finding the Fourth Proportional to 128,452.72, 177,324.27 and 74,718.16

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Solution

The fourth proportional to 128,452.72, 177,324.27 and 74,718.16 is: 103,145.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,452.72 : 177,324.27 = 74,718.16 : x
  2. Step 2: Convert to fraction form
    128,452.72/177,324.27 = 74,718.16/x
  3. Step 3: Cross multiply
    128,452.72x = 177,324.27 × 74,718.16
  4. Step 4: Simplify right side
    128,452.72x = 13,249,343,177.74
  5. Step 5: Solve for x
    x = 13,249,343,177.74/128,452.72
  6. Step 6: Final answer
    x = 103,145.68

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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.