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Finding the Fourth Proportional to 211,339.25, 291,678 and 130,792.72

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Solution

The fourth proportional to 211,339.25, 291,678 and 130,792.72 is: 180,512.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,339.25 : 291,678 = 130,792.72 : x
  2. Step 2: Convert to fraction form
    211,339.25/291,678 = 130,792.72/x
  3. Step 3: Cross multiply
    211,339.25x = 291,678 × 130,792.72
  4. Step 4: Simplify right side
    211,339.25x = 38,149,358,984.16
  5. Step 5: Solve for x
    x = 38,149,358,984.16/211,339.25
  6. Step 6: Final answer
    x = 180,512.42

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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.