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Finding the Fourth Proportional to 85,980.13, 118,659.66 and 47,742.05

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Solution

The fourth proportional to 85,980.13, 118,659.66 and 47,742.05 is: 65,887.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,980.13 : 118,659.66 = 47,742.05 : x
  2. Step 2: Convert to fraction form
    85,980.13/118,659.66 = 47,742.05/x
  3. Step 3: Cross multiply
    85,980.13x = 118,659.66 × 47,742.05
  4. Step 4: Simplify right side
    85,980.13x = 5,665,055,420.70
  5. Step 5: Solve for x
    x = 5,665,055,420.70/85,980.13
  6. Step 6: Final answer
    x = 65,887.96

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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.