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Finding the Fourth Proportional to 45,499.20, 68,248.80 and 42,907.20

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Solution

The fourth proportional to 45,499.20, 68,248.80 and 42,907.20 is: 64,360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,499.20 : 68,248.80 = 42,907.20 : x
  2. Step 2: Convert to fraction form
    45,499.20/68,248.80 = 42,907.20/x
  3. Step 3: Cross multiply
    45,499.20x = 68,248.80 × 42,907.20
  4. Step 4: Simplify right side
    45,499.20x = 2,928,364,911.36
  5. Step 5: Solve for x
    x = 2,928,364,911.36/45,499.20
  6. Step 6: Final answer
    x = 64,360.80

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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.