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Finding the Fourth Proportional to 86,865.20, 130,200.60 and 49,443.20

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Solution

The fourth proportional to 86,865.20, 130,200.60 and 49,443.20 is: 74,109.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,865.20 : 130,200.60 = 49,443.20 : x
  2. Step 2: Convert to fraction form
    86,865.20/130,200.60 = 49,443.20/x
  3. Step 3: Cross multiply
    86,865.20x = 130,200.60 × 49,443.20
  4. Step 4: Simplify right side
    86,865.20x = 6,437,534,305.92
  5. Step 5: Solve for x
    x = 6,437,534,305.92/86,865.20
  6. Step 6: Final answer
    x = 74,109.47

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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.