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Finding the Fourth Proportional to 123,672,830.40, 172,915,214.40 and 123,672,830.40

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Solution

The fourth proportional to 123,672,830.40, 172,915,214.40 and 123,672,830.40 is: 172,915,214.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,672,830.40 : 172,915,214.40 = 123,672,830.40 : x
  2. Step 2: Convert to fraction form
    123,672,830.40/172,915,214.40 = 123,672,830.40/x
  3. Step 3: Cross multiply
    123,672,830.40x = 172,915,214.40 × 123,672,830.40
  4. Step 4: Simplify right side
    123,672,830.40x = 21,384,913,984,070,840
  5. Step 5: Solve for x
    x = 21,384,913,984,070,840/123,672,830.40
  6. Step 6: Final answer
    x = 172,915,214.40

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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.