Home / 153,422.09-211,720.77-85,437.57

Finding the Fourth Proportional to 153,422.09, 211,720.77 and 85,437.57

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Solution

The fourth proportional to 153,422.09, 211,720.77 and 85,437.57 is: 117,902.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,422.09 : 211,720.77 = 85,437.57 : x
  2. Step 2: Convert to fraction form
    153,422.09/211,720.77 = 85,437.57/x
  3. Step 3: Cross multiply
    153,422.09x = 211,720.77 × 85,437.57
  4. Step 4: Simplify right side
    153,422.09x = 18,088,908,107.33
  5. Step 5: Solve for x
    x = 18,088,908,107.33/153,422.09
  6. Step 6: Final answer
    x = 117,902.90

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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.