Home / 153,215.75-211,436.43-85,231.49

Finding the Fourth Proportional to 153,215.75, 211,436.43 and 85,231.49

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Solution

The fourth proportional to 153,215.75, 211,436.43 and 85,231.49 is: 117,618.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,215.75 : 211,436.43 = 85,231.49 : x
  2. Step 2: Convert to fraction form
    153,215.75/211,436.43 = 85,231.49/x
  3. Step 3: Cross multiply
    153,215.75x = 211,436.43 × 85,231.49
  4. Step 4: Simplify right side
    153,215.75x = 18,021,041,781.71
  5. Step 5: Solve for x
    x = 18,021,041,781.71/153,215.75
  6. Step 6: Final answer
    x = 117,618.73

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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.