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Finding the Fourth Proportional to 78,999.56, 109,021.12 and 47,162.52

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Solution

The fourth proportional to 78,999.56, 109,021.12 and 47,162.52 is: 65,085.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,999.56 : 109,021.12 = 47,162.52 : x
  2. Step 2: Convert to fraction form
    78,999.56/109,021.12 = 47,162.52/x
  3. Step 3: Cross multiply
    78,999.56x = 109,021.12 × 47,162.52
  4. Step 4: Simplify right side
    78,999.56x = 5,141,710,752.42
  5. Step 5: Solve for x
    x = 5,141,710,752.42/78,999.56
  6. Step 6: Final answer
    x = 65,085.31

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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.