Home / 72,021,128.40-99,389,149.47-38,981,371.50

Finding the Fourth Proportional to 72,021,128.40, 99,389,149.47 and 38,981,371.50

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Solution

The fourth proportional to 72,021,128.40, 99,389,149.47 and 38,981,371.50 is: 53,794,288.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,021,128.40 : 99,389,149.47 = 38,981,371.50 : x
  2. Step 2: Convert to fraction form
    72,021,128.40/99,389,149.47 = 38,981,371.50/x
  3. Step 3: Cross multiply
    72,021,128.40x = 99,389,149.47 × 38,981,371.50
  4. Step 4: Simplify right side
    72,021,128.40x = 3,874,325,358,559,098
  5. Step 5: Solve for x
    x = 3,874,325,358,559,098/72,021,128.40
  6. Step 6: Final answer
    x = 53,794,288.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.