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Finding the Fourth Proportional to 155,423,843.85, 217,911,886.35 and 155,423,843.85

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Solution

The fourth proportional to 155,423,843.85, 217,911,886.35 and 155,423,843.85 is: 217,911,886.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,423,843.85 : 217,911,886.35 = 155,423,843.85 : x
  2. Step 2: Convert to fraction form
    155,423,843.85/217,911,886.35 = 155,423,843.85/x
  3. Step 3: Cross multiply
    155,423,843.85x = 217,911,886.35 × 155,423,843.85
  4. Step 4: Simplify right side
    155,423,843.85x = 33,868,702,997,121,344
  5. Step 5: Solve for x
    x = 33,868,702,997,121,344/155,423,843.85
  6. Step 6: Final answer
    x = 217,911,886.35

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.