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Finding the Fourth Proportional to 155,423,912.10, 217,911,981.90 and 155,423,912.10

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Solution

The fourth proportional to 155,423,912.10, 217,911,981.90 and 155,423,912.10 is: 217,911,981.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,423,912.10 : 217,911,981.90 = 155,423,912.10 : x
  2. Step 2: Convert to fraction form
    155,423,912.10/217,911,981.90 = 155,423,912.10/x
  3. Step 3: Cross multiply
    155,423,912.10x = 217,911,981.90 × 155,423,912.10
  4. Step 4: Simplify right side
    155,423,912.10x = 33,868,732,720,362,392
  5. Step 5: Solve for x
    x = 33,868,732,720,362,392/155,423,912.10
  6. Step 6: Final answer
    x = 217,911,981.90

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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.