Home / 218,644,864.80-328,093,268.40-82,428,007.20

Finding the Fourth Proportional to 218,644,864.80, 328,093,268.40 and 82,428,007.20

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Solution

The fourth proportional to 218,644,864.80, 328,093,268.40 and 82,428,007.20 is: 123,689,501.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,644,864.80 : 328,093,268.40 = 82,428,007.20 : x
  2. Step 2: Convert to fraction form
    218,644,864.80/328,093,268.40 = 82,428,007.20/x
  3. Step 3: Cross multiply
    218,644,864.80x = 328,093,268.40 × 82,428,007.20
  4. Step 4: Simplify right side
    218,644,864.80x = 27,044,074,289,946,732
  5. Step 5: Solve for x
    x = 27,044,074,289,946,732/218,644,864.80
  6. Step 6: Final answer
    x = 123,689,501.30

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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.