Home / 117,128.18-161,639.62-66,157.32

Finding the Fourth Proportional to 117,128.18, 161,639.62 and 66,157.32

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Solution

The fourth proportional to 117,128.18, 161,639.62 and 66,157.32 is: 91,298.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,128.18 : 161,639.62 = 66,157.32 : x
  2. Step 2: Convert to fraction form
    117,128.18/161,639.62 = 66,157.32/x
  3. Step 3: Cross multiply
    117,128.18x = 161,639.62 × 66,157.32
  4. Step 4: Simplify right side
    117,128.18x = 10,693,644,065.02
  5. Step 5: Solve for x
    x = 10,693,644,065.02/117,128.18
  6. Step 6: Final answer
    x = 91,298.64

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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.