Home / 99,391,021.41-148,892,580.42-77,428,565.28

Finding the Fourth Proportional to 99,391,021.41, 148,892,580.42 and 77,428,565.28

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Solution

The fourth proportional to 99,391,021.41, 148,892,580.42 and 77,428,565.28 is: 115,991,753.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,391,021.41 : 148,892,580.42 = 77,428,565.28 : x
  2. Step 2: Convert to fraction form
    99,391,021.41/148,892,580.42 = 77,428,565.28/x
  3. Step 3: Cross multiply
    99,391,021.41x = 148,892,580.42 × 77,428,565.28
  4. Step 4: Simplify right side
    99,391,021.41x = 11,528,538,882,757,618
  5. Step 5: Solve for x
    x = 11,528,538,882,757,618/99,391,021.41
  6. Step 6: Final answer
    x = 115,991,753.77

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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.