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Finding the Fourth Proportional to 153,294.40, 211,544.71 and 85,310.21

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Solution

The fourth proportional to 153,294.40, 211,544.71 and 85,310.21 is: 117,727.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,294.40 : 211,544.71 = 85,310.21 : x
  2. Step 2: Convert to fraction form
    153,294.40/211,544.71 = 85,310.21/x
  3. Step 3: Cross multiply
    153,294.40x = 211,544.71 × 85,310.21
  4. Step 4: Simplify right side
    153,294.40x = 18,046,923,634.49
  5. Step 5: Solve for x
    x = 18,046,923,634.49/153,294.40
  6. Step 6: Final answer
    x = 117,727.22

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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.