Home / 258,059,097.20-387,088,645.80-212,672,140.40

Finding the Fourth Proportional to 258,059,097.20, 387,088,645.80 and 212,672,140.40

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Solution

The fourth proportional to 258,059,097.20, 387,088,645.80 and 212,672,140.40 is: 319,008,210.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,059,097.20 : 387,088,645.80 = 212,672,140.40 : x
  2. Step 2: Convert to fraction form
    258,059,097.20/387,088,645.80 = 212,672,140.40/x
  3. Step 3: Cross multiply
    258,059,097.20x = 387,088,645.80 × 212,672,140.40
  4. Step 4: Simplify right side
    258,059,097.20x = 82,322,970,826,823,472
  5. Step 5: Solve for x
    x = 82,322,970,826,823,472/258,059,097.20
  6. Step 6: Final answer
    x = 319,008,210.60

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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.