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Finding the Fourth Proportional to 172,021,427.20, 258,032,140.80 and 172,021,427.20

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Solution

The fourth proportional to 172,021,427.20, 258,032,140.80 and 172,021,427.20 is: 258,032,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,021,427.20 : 258,032,140.80 = 172,021,427.20 : x
  2. Step 2: Convert to fraction form
    172,021,427.20/258,032,140.80 = 172,021,427.20/x
  3. Step 3: Cross multiply
    172,021,427.20x = 258,032,140.80 × 172,021,427.20
  4. Step 4: Simplify right side
    172,021,427.20x = 44,387,057,123,887,352
  5. Step 5: Solve for x
    x = 44,387,057,123,887,352/172,021,427.20
  6. Step 6: Final answer
    x = 258,032,140.80

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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.