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Finding the Fourth Proportional to 86,687.20, 130,048.96 and 49,264.64

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Solution

The fourth proportional to 86,687.20, 130,048.96 and 49,264.64 is: 73,907.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,687.20 : 130,048.96 = 49,264.64 : x
  2. Step 2: Convert to fraction form
    86,687.20/130,048.96 = 49,264.64/x
  3. Step 3: Cross multiply
    86,687.20x = 130,048.96 × 49,264.64
  4. Step 4: Simplify right side
    86,687.20x = 6,406,815,196.77
  5. Step 5: Solve for x
    x = 6,406,815,196.77/86,687.20
  6. Step 6: Final answer
    x = 73,907.28

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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.