Home / 153,128.20-211,317.51-85,151.38

Finding the Fourth Proportional to 153,128.20, 211,317.51 and 85,151.38

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Solution

The fourth proportional to 153,128.20, 211,317.51 and 85,151.38 is: 117,509.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,128.20 : 211,317.51 = 85,151.38 : x
  2. Step 2: Convert to fraction form
    153,128.20/211,317.51 = 85,151.38/x
  3. Step 3: Cross multiply
    153,128.20x = 211,317.51 × 85,151.38
  4. Step 4: Simplify right side
    153,128.20x = 17,993,977,594.66
  5. Step 5: Solve for x
    x = 17,993,977,594.66/153,128.20
  6. Step 6: Final answer
    x = 117,509.23

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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.