Home / 42,747,843.60-64,163,755.80-21,206,768.40

Finding the Fourth Proportional to 42,747,843.60, 64,163,755.80 and 21,206,768.40

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Solution

The fourth proportional to 42,747,843.60, 64,163,755.80 and 21,206,768.40 is: 31,830,983.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,747,843.60 : 64,163,755.80 = 21,206,768.40 : x
  2. Step 2: Convert to fraction form
    42,747,843.60/64,163,755.80 = 21,206,768.40/x
  3. Step 3: Cross multiply
    42,747,843.60x = 64,163,755.80 × 21,206,768.40
  4. Step 4: Simplify right side
    42,747,843.60x = 1,360,705,908,924,756.50
  5. Step 5: Solve for x
    x = 1,360,705,908,924,756.50/42,747,843.60
  6. Step 6: Final answer
    x = 31,830,983.61

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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.