Home / 85,520.16-117,985.68-47,780.64

Finding the Fourth Proportional to 85,520.16, 117,985.68 and 47,780.64

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Solution

The fourth proportional to 85,520.16, 117,985.68 and 47,780.64 is: 65,919.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.16 : 117,985.68 = 47,780.64 : x
  2. Step 2: Convert to fraction form
    85,520.16/117,985.68 = 47,780.64/x
  3. Step 3: Cross multiply
    85,520.16x = 117,985.68 × 47,780.64
  4. Step 4: Simplify right side
    85,520.16x = 5,637,431,301.24
  5. Step 5: Solve for x
    x = 5,637,431,301.24/85,520.16
  6. Step 6: Final answer
    x = 65,919.33

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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.