Home / 218,645,999.80-328,094,970.90-82,429,142.20

Finding the Fourth Proportional to 218,645,999.80, 328,094,970.90 and 82,429,142.20

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Solution

The fourth proportional to 218,645,999.80, 328,094,970.90 and 82,429,142.20 is: 123,691,204.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,645,999.80 : 328,094,970.90 = 82,429,142.20 : x
  2. Step 2: Convert to fraction form
    218,645,999.80/328,094,970.90 = 82,429,142.20/x
  3. Step 3: Cross multiply
    218,645,999.80x = 328,094,970.90 × 82,429,142.20
  4. Step 4: Simplify right side
    218,645,999.80x = 27,044,587,011,420,960
  5. Step 5: Solve for x
    x = 27,044,587,011,420,960/218,645,999.80
  6. Step 6: Final answer
    x = 123,691,204.21

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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.