Home / 153,400.07-211,757.42-103,128.23

Finding the Fourth Proportional to 153,400.07, 211,757.42 and 103,128.23

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Solution

The fourth proportional to 153,400.07, 211,757.42 and 103,128.23 is: 142,360.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,400.07 : 211,757.42 = 103,128.23 : x
  2. Step 2: Convert to fraction form
    153,400.07/211,757.42 = 103,128.23/x
  3. Step 3: Cross multiply
    153,400.07x = 211,757.42 × 103,128.23
  4. Step 4: Simplify right side
    153,400.07x = 21,838,167,913.97
  5. Step 5: Solve for x
    x = 21,838,167,913.97/153,400.07
  6. Step 6: Final answer
    x = 142,360.87

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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.