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Finding the Fourth Proportional to 475,771.52, 713,587.56 and 138,721.64

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Solution

The fourth proportional to 475,771.52, 713,587.56 and 138,721.64 is: 208,062.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    475,771.52 : 713,587.56 = 138,721.64 : x
  2. Step 2: Convert to fraction form
    475,771.52/713,587.56 = 138,721.64/x
  3. Step 3: Cross multiply
    475,771.52x = 713,587.56 × 138,721.64
  4. Step 4: Simplify right side
    475,771.52x = 98,990,036,606.80
  5. Step 5: Solve for x
    x = 98,990,036,606.80/475,771.52
  6. Step 6: Final answer
    x = 208,062.13

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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.