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Finding the Fourth Proportional to 476,709.90, 715,064.76 and 121,711.20

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Solution

The fourth proportional to 476,709.90, 715,064.76 and 121,711.20 is: 182,566.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,709.90 : 715,064.76 = 121,711.20 : x
  2. Step 2: Convert to fraction form
    476,709.90/715,064.76 = 121,711.20/x
  3. Step 3: Cross multiply
    476,709.90x = 715,064.76 × 121,711.20
  4. Step 4: Simplify right side
    476,709.90x = 87,031,390,017.31
  5. Step 5: Solve for x
    x = 87,031,390,017.31/476,709.90
  6. Step 6: Final answer
    x = 182,566.78

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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.