Home / 113,617-156,731.82-86,712.64

Finding the Fourth Proportional to 113,617, 156,731.82 and 86,712.64

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Solution

The fourth proportional to 113,617, 156,731.82 and 86,712.64 is: 119,617.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,617 : 156,731.82 = 86,712.64 : x
  2. Step 2: Convert to fraction form
    113,617/156,731.82 = 86,712.64/x
  3. Step 3: Cross multiply
    113,617x = 156,731.82 × 86,712.64
  4. Step 4: Simplify right side
    113,617x = 13,590,629,884.20
  5. Step 5: Solve for x
    x = 13,590,629,884.20/113,617
  6. Step 6: Final answer
    x = 119,617.93

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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.