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Finding the Fourth Proportional to 78,027.80, 116,843.70 and 42,927.80

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Solution

The fourth proportional to 78,027.80, 116,843.70 and 42,927.80 is: 64,282.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,027.80 : 116,843.70 = 42,927.80 : x
  2. Step 2: Convert to fraction form
    78,027.80/116,843.70 = 42,927.80/x
  3. Step 3: Cross multiply
    78,027.80x = 116,843.70 × 42,927.80
  4. Step 4: Simplify right side
    78,027.80x = 5,015,842,984.86
  5. Step 5: Solve for x
    x = 5,015,842,984.86/78,027.80
  6. Step 6: Final answer
    x = 64,282.77

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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.