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Finding the Fourth Proportional to 123,679,406.80, 185,519,110.20 and 77,762,904.40

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Solution

The fourth proportional to 123,679,406.80, 185,519,110.20 and 77,762,904.40 is: 116,644,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,679,406.80 : 185,519,110.20 = 77,762,904.40 : x
  2. Step 2: Convert to fraction form
    123,679,406.80/185,519,110.20 = 77,762,904.40/x
  3. Step 3: Cross multiply
    123,679,406.80x = 185,519,110.20 × 77,762,904.40
  4. Step 4: Simplify right side
    123,679,406.80x = 14,426,504,830,855,666
  5. Step 5: Solve for x
    x = 14,426,504,830,855,666/123,679,406.80
  6. Step 6: Final answer
    x = 116,644,356.60

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1.5x scale

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.