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Finding the Fourth Proportional to 78,017.96, 116,955.65 and 28,086.64

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Solution

The fourth proportional to 78,017.96, 116,955.65 and 28,086.64 is: 42,104.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,017.96 : 116,955.65 = 28,086.64 : x
  2. Step 2: Convert to fraction form
    78,017.96/116,955.65 = 28,086.64/x
  3. Step 3: Cross multiply
    78,017.96x = 116,955.65 × 28,086.64
  4. Step 4: Simplify right side
    78,017.96x = 3,284,891,015.34
  5. Step 5: Solve for x
    x = 3,284,891,015.34/78,017.96
  6. Step 6: Final answer
    x = 42,104.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.