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Finding the Fourth Proportional to 115,065.51, 172,621.80 and 48,505.65

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Solution

The fourth proportional to 115,065.51, 172,621.80 and 48,505.65 is: 72,768.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,065.51 : 172,621.80 = 48,505.65 : x
  2. Step 2: Convert to fraction form
    115,065.51/172,621.80 = 48,505.65/x
  3. Step 3: Cross multiply
    115,065.51x = 172,621.80 × 48,505.65
  4. Step 4: Simplify right side
    115,065.51x = 8,373,132,613.17
  5. Step 5: Solve for x
    x = 8,373,132,613.17/115,065.51
  6. Step 6: Final answer
    x = 72,768.40

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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.