Home / 153,111.72-211,301.21-85,135.68

Finding the Fourth Proportional to 153,111.72, 211,301.21 and 85,135.68

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Solution

The fourth proportional to 153,111.72, 211,301.21 and 85,135.68 is: 117,491.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,111.72 : 211,301.21 = 85,135.68 : x
  2. Step 2: Convert to fraction form
    153,111.72/211,301.21 = 85,135.68/x
  3. Step 3: Cross multiply
    153,111.72x = 211,301.21 × 85,135.68
  4. Step 4: Simplify right side
    153,111.72x = 17,989,271,772.49
  5. Step 5: Solve for x
    x = 17,989,271,772.49/153,111.72
  6. Step 6: Final answer
    x = 117,491.15

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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.