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Finding the Fourth Proportional to 117,319.56, 161,858.57 and 77,055.15

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Solution

The fourth proportional to 117,319.56, 161,858.57 and 77,055.15 is: 106,308.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,319.56 : 161,858.57 = 77,055.15 : x
  2. Step 2: Convert to fraction form
    117,319.56/161,858.57 = 77,055.15/x
  3. Step 3: Cross multiply
    117,319.56x = 161,858.57 × 77,055.15
  4. Step 4: Simplify right side
    117,319.56x = 12,472,036,004.86
  5. Step 5: Solve for x
    x = 12,472,036,004.86/117,319.56
  6. Step 6: Final answer
    x = 106,308.24

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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.