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Finding the Fourth Proportional to 48,751.40, 72,908.40 and 40,878.20

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Solution

The fourth proportional to 48,751.40, 72,908.40 and 40,878.20 is: 61,133.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,751.40 : 72,908.40 = 40,878.20 : x
  2. Step 2: Convert to fraction form
    48,751.40/72,908.40 = 40,878.20/x
  3. Step 3: Cross multiply
    48,751.40x = 72,908.40 × 40,878.20
  4. Step 4: Simplify right side
    48,751.40x = 2,980,364,156.88
  5. Step 5: Solve for x
    x = 2,980,364,156.88/48,751.40
  6. Step 6: Final answer
    x = 61,133.92

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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.