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Finding the Fourth Proportional to 61,784,072.80, 92,676,109.20 and 21,381,128.80

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Solution

The fourth proportional to 61,784,072.80, 92,676,109.20 and 21,381,128.80 is: 32,071,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,784,072.80 : 92,676,109.20 = 21,381,128.80 : x
  2. Step 2: Convert to fraction form
    61,784,072.80/92,676,109.20 = 21,381,128.80/x
  3. Step 3: Cross multiply
    61,784,072.80x = 92,676,109.20 × 21,381,128.80
  4. Step 4: Simplify right side
    61,784,072.80x = 1,981,519,827,488,065
  5. Step 5: Solve for x
    x = 1,981,519,827,488,065/61,784,072.80
  6. Step 6: Final answer
    x = 32,071,693.20

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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.