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Finding the Fourth Proportional to 61,797,940.80, 92,696,911.20 and 18,662,646.30

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Solution

The fourth proportional to 61,797,940.80, 92,696,911.20 and 18,662,646.30 is: 27,993,969.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,797,940.80 : 92,696,911.20 = 18,662,646.30 : x
  2. Step 2: Convert to fraction form
    61,797,940.80/92,696,911.20 = 18,662,646.30/x
  3. Step 3: Cross multiply
    61,797,940.80x = 92,696,911.20 × 18,662,646.30
  4. Step 4: Simplify right side
    61,797,940.80x = 1,729,969,666,828,108.75
  5. Step 5: Solve for x
    x = 1,729,969,666,828,108.75/61,797,940.80
  6. Step 6: Final answer
    x = 27,993,969.45

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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.